I shall sing a song of praise over and over again for the great results we have achieved in applied science and for the even greater advances you are about to bring about.
Indeed, we are in the age of applied science and in the land of such applied science. It would be wrong to say that I am speaking out of time now! Just as some people think that the unenlightened Indians are economically unproductive and unpleasant to live with, but I do not.
The fact that the children of enlightened nations are so fond of the game of "Indians" is profound. The great applied sciences, in turn, have made us less laborious and more comfortable.
But why does it bring us so little happiness now? The simple answer is: because we still do not put science to rational use. In times of war, science serves us to potentially poison and harm each other, and in times of peace, it makes our lives hurried and unstable.
Instead of massively freeing us from brain-consuming labor, it has given people slaves to the machine - people who spend most of their time in long, monotonous, distasteful work and have to keep worrying about their poor rations. You may think that I am an old man singing a bad song, but I say this with a good purpose - to point out the importance and future of science.
In order that your work may benefit mankind, it is not enough to know how to apply science itself! Concern for mankind itself and its destiny necessarily always fosters an interest in striving to learn all kinds of techniques; and concern for the unsolved problems of the origin of the immense labor and the distribution of commodities - for the sake of the establishment of our ideology - will bring happiness, not disaster, to the whole of mankind. Never forget this in your charts and equations.
He also argues that the last two lines of Li Bai's masterpiece, "Silent Night Thoughts," are "subjective lenses" - "raising my head to look at the moon" is an upward lens, and "bowing my head to think of my homeland" is an upward lens, and "bowing my head to think of my homeland" is an upward lens. "Looking down and thinking of my hometown" is a top-down lens. A painter reading ancient poetry, like to analyze the colors in the poem, she thought "a little red among the green bushes", "a branch of red apricots out of the wall", is to emphasize the warm tones, and the use of cold tones as a backdrop.
"White hair floating green water, red palm dialing green wave", the goose in the water that the distinctive colors written how realistic, and Su Shi's "black clouds turn ink not cover the mountain, white rain jumping beads into the boat" is a painting in ink. I like Li He's song "Dreaming of Heaven", which is full of fantasy colors.
The poet dreamed of Nanke, traveling in space, he "turned back and looked down at the world", see what the scenery? Heh, "look at the Qizhou nine points of smoke, a large sea water in the cup diarrhea! Originally, he saw that the nine states of China were like nine dots of smoke, and the sea seemed to be a cup of clear water. This scene, as if the astronauts in space to see as real.
However, Li He lived in the Tang Dynasty and never left the Earth, and never heard of "cosmic voyages", and he was only 27 years old. I have recited "Dreaming of Heaven" over and over again, and y admired the rich scientific imagination of this young poet! I thought that Wang Zhihuan's famous line, "I want to see a thousand miles, but I want to go up one level", was strictly in line with the laws of geometry.
Indeed, "to see far, you must climb high, and to climb high, you can see far". The higher the observation point, the larger and wider the visible range, the so-called " A " (Du Fu, "Looking at Yue").
In ancient times, people built high beacons, and then people fought wars to seize the high ground first, until now people use airplanes, artificial satellites, that "height advantage" for reconnaissance, survey, photography, which the scientific principles, is not the same as Wang Zhihuan's poem belongs to the "same reason! "The scientific principle is the same as that of Wang Zhihuan's poem! Xin Qiji lived in the countryside for more than twenty years, and his words are rich in agricultural knowledge. The phrase "speaking of a good year in the fragrance of rice flowers and listening to the sound of frogs" in the "Moon in the West River" reveals the organic connection between "the sound of frogs" and "a good year". In "Moon in the Moon", "The sound of frogs is heard in the fragrance of rice flowers" reveals the organic connection between the sound of frogs and a good year. Frogs are commonly known as the "guardian of the grain worm", is a member of the great generals of the insect hunters.
The sound of frogs, in addition to the pests, will make the rice fragrant and the grains plentiful. In the Partridge Sky, Xin Qiji wrote a refreshing sentence, "The soft mulberry on the strand breaks the buds, and the silkworms in the eastern neighborhood have already begun to grow some", which shows that the Song Dynasty was already well aware of the art of sericulture, and was very good at mastering the season of hatching silkworms and raising silkworms.
His famous line in "Bodhisattva Barbarian", "The green hills cannot hide it, but after all, it flows in the east", is in line with the law of thermodynamics, which shows that any object has a tendency to reduce its own energy automatically, and even the "green hills" cannot hide it! In his poem "Gift to Mr. Wei Bashi", DU Fu wrote an unremarkable line - "Cutting spring leeks in the night rain". I think, from these five words, you can test out a lot of knowledge about the Tang Dynasty planting leeks: First, leeks are commonly known as "lazy man's vegetable".
Planted once, cut many times. Tang Dynasty leeks, already know that leeks are perennial herbs, you can cut the long, long cut, rather than uprooted down; Second, the Tang Dynasty when the spring leeks are known to be tender and tasty, and know that in the spring rainy night to cut, when cut leeks watery, can be used as a delicacy.
Interestingly, I also often find that some of the verses from the literature is a rare good line, from the scientific evidence is not quite right. For example, Li Bai "will enter the wine" a poem in the first two lines, has been recited by many people - "B", in fact, "run to the sea" into water vapor, or "back", still from the "sky", fell into the Yellow River, and then "run to the sea", so the cycle goes on and on.
China is the land of poetry. For many years, how many poets have been writing for hundreds of years, and how many long poems and short lines have been written?
However, people are accustomed to reviewing, selecting, commenting and evaluating poems only from a literary point of view.
Read [Showcase] How far is the myth of science from you and me? 224500 Jiangsu Yancheng Junior High School Lu Yi The Forest World Science and Technology Festival has arrived, and Auntie Chicken has put a question on the blackboard: students, do you think science can create myths? Please use your imagination and do some science experiments to prove your ideas. As soon as the blue cat, naughty, Fifi three science and technology enthusiasts returned, they dove headfirst into the laboratory.
1. seawater can also quench the thirst Just into the laboratory, the blue cat was thirsty, they went to pour water,.
2. How to write an essay about scientific principlesThere is science everywhere in life, just do not pay attention to it. People in their daily lives in clothing, food, housing and transportation, where there is no science, as for production, labor, sports, health, military, but also the need for science." To honor science, to ignorance for shame" in the daily life of many common sense, they are the experience of the previous generation. So, we mechanically take for granted that these common sense of life is correct and useful, often without thinking to do. Over time to become a habit, but also let your life trouble, because these so-called "experience", "common sense" is precisely contrary to the common sense of life, and to believe in science, only respect science, it is possible to avoid taboos, and less troubled by their troubles.
In winter, the weather is cold, glass bottle caps are often unscrewed, how hard it can not work, experienced people as long as the bottle cap on the fire grill. It can be easily unscrewed. Do you know why this is? This is the reason of heat expansion and cold contraction. When the weather is cold, the bottle cap contraction, tightly biting the bottle mouth, it is not easy to unscrew, baking fire heat expansion, the bottle cap will be loose, so it does not take much effort to open.
When the old man threaded the needle laboriously, she put the needle on the hair to rub, do you know why this is? This is actually in the lubrication to reduce friction. Human hair contains oil, the needle in the hair when rubbing is the same as adding lubricant, so it can reduce the friction, it can be very easy to thread the needle.
Luncheon meat, pangasius in black bean sauce, and beans in eggplant sauce ...... are all delicious canned foods that can be stored for a long time without spoiling. This is because canned food is sealed so that bacteria cannot get in. When people make canned food, they take all the air out of the can and seal it. In the absence of air, even if the food inside gets a little bit of bacteria on it, they can't survive or reproduce! This utilizes air as a condition for the survival of microorganisms.
Some foods can't be heated at high temperatures without affecting their nutrition and flavor. For these foods, we can quickly heat them to a certain temperature (generally 60 ℃ ~ 85 ℃) for 15 to 30 minutes, and then quickly cooled. This kills most of the microorganisms in the food and preserves the original flavor. This heating method is called Pasteur's method of sterilization, which was invented by the French scientist Louis Pasteur,
Science is the study of natural phenomena and the search for the causes and laws that govern their emergence and development. Every little doubt may lead to a scientific discovery. Lsaac Newton (Lsaac Newton) was curious about apples falling to the ground and discovered the law of universal gravitation; James Watt (James Watt) was curious about water boiling and lifting the lid of the kettle and improved the steam engine. We can all enter the world of science if we are observant and start by investigating the problems around us. Science is all around us.
3. to science and technology around us as the topic of writing a 400-word essay, thank youThe first; "science", what a wonderful thing, it makes many scientists are willing to pay for it their life's work. Many people think that science is far away from us, in fact, science is around you and me. When the holidays came, I had more time to myself, so I became interested in science experiments. I did the egg "shrinking" experiment. I first boiled the egg, peeled it, then poured half a bottle of boiling water into an empty glass bottle, then put the egg in the mouth of the bottle, I stared at it with wide eyes and watched it carefully, and found that the egg was shrinking, shrinking, slowly falling down, and finally, it fell into the bottle at once. Although, the book said that the egg will definitely fall into the bottle, but, I was still dazzled by the scene in front of me, a sense of pride! "The test was successful!" I couldn't help but shout. How was the egg able to shrink and fall into the bottle? I opened my book with a question. It turned out that as the water temperature dropped, the space occupied by the water inside the bottle became smaller, so the air inside the bottle then occupied a larger space, so that the air around the bottle would squeeze the egg, forcing it to slide into the bottle. Oh, let the egg fell into the bottle is not "shrinkage", but, the work of atmospheric pressure ah! Next, I did the "water pressure bubble" experiment. I first poured some laundry detergent into a bowl, stirring, pouring water in another bowl, a toilet paper roll end dipped in a little laundry detergent water, and then put the other end into the water, then, a colorful bubbles appeared. I repeatedly do this experiment, I think it is really interesting, do not need to blow mouth, as long as the toilet paper roll end dipped in laundry detergent water, the other end into the water, colorful water bubbles will immediately appear. I excitedly called my mom and dad to enjoy, my mom and dad also feel magical, asked me how this experiment contains the scientific reasoning, I still find the answer from the book: when we slowly dip the reel into the water, the atmospheric pressure to promote the bowl of water into the reel, the air inside the cylinder is squeezed by the gradual rise, which in turn pushes the laundry detergent film drum up. Since the film has surface tension, it won't break when it bulges. So that's how it works! I've learned another science lesson. Dad wanted to move two large pieces of glass and wanted me to work with him, but he was worried about breaking the glass. What should I do? Dad put a few drops of water on one piece of glass, and then we carefully covered the other glass with it, and the two pieces of glass actually stuck together. We easily moved the two large pieces of glass to a safe place. I was a little confused: how could a few drops of water make two pieces of glass stick together? The book "Science" helped me to understand the mystery: glass sticks together because of the adhesion between the glass molecules and the water molecules. Adhesion is a powerful force of attraction that exists between different substances and molecules, and under the action of this force, the two pieces of glass are firmly stuck together and difficult to separate. It seems that science is in our lives, as long as we observe carefully, think carefully, combined with books, contact with reality, we can find the scientific principles, so that science serves our lives, improve our quality of life. Secondly, we are all familiar with the word "science and technology". Simply put, science and technology is science and technology. From a broad perspective, it refers to the sum of natural science and technology and social science and technology. Since the reform and opening up, with the passage of time, science and technology are developing rapidly in the motherland like bamboo shoots after rain. Looking around life, science and technology is everywhere, science and technology is around me! Walking on the road at night, there are electric lights to give us lighting; to give a friend a phone call, can pull out a cell phone; back home, turn on the TV to see the news, turn on the computer, you can chat with your friends; mom with a rice cooker steamed rice; open the electric heater; the family sat around together, enjoying the mom with an electric frying pan modulation out of the delicious food you see, at any time, any place, we can leave the science and technology? There are many uses for technology! For example: if there is no electric car, we will be inconvenient and distant friends and relatives to interact; if there is no rolling stock, people travel to various places it is difficult to realize the night and day; if there is no space shuttle, people into space will be an empty word; if there is no icebreaker, we will be very difficult to the Antarctic expedition; if there is no spacecraft, the people to the moon will be only a fantasy on the contrary, with science and technology, our lives will become Better - with a fax, our documents, instantly can easily pass out! With robots, it can be located in the space people can not reach; the use of lasers, can be made into fitness equipment; with air conditioning, even if it is hot summer, can make people comfortable as spring is not difficult to see: all of this, people enjoy the fruits of science and technology! It can be seen: science and technology, to help us create a superior living environment; science and technology, to improve the quality of our lives; science and technology, is the crystallization of the wisdom of people around the world! We are in science and technology, we must continue to learn new technology! Science and technology is all around us, we also need to vigorously develop science and technology.
4. to science as the topic of the essayI love science
Hubei Province, Honghu Experimental Primary School 601 Shaoquan
Today, my mother bought me a set of molded sailing ship parts, I was happy to jump three feet high, a cute little face a blink into a big and red peony flowers, but also straight twist ***, that happy energy need not mention. In the afternoon, I asked Deng Sai and Bai Fan to come over and help me put together the model.
"Work" ready, I give the white sail and Deng Sai divided into "tasks" and began to act. I first use the universal glue to glue the deck, and then put the cockpit. By this time, Deng Sai had already made the five-star red flag. Then I glued it on and started to make the hull. I put together the bottom of the boat with the two bottom plates, and then put the two side plates on. Hmm! The basic shape of the boat was done. Next, I used screws to secure the hull. At this time, one screw seemed to be playing hide-and-seek with us, and I couldn't find it. Suddenly, I thought that Zhang Yunchao had screws at home, so I quickly ran to his house and asked for a few, and when I came back, I was already sweating profusely. But I didn't say a word, and immediately put the screws on. Finally, there was only the installation of those tiny parts left, which was a big problem. I just wanted to give up, Bai Fan said to me, "Shao Quan, your mother did not tell you! Don't give up halfway, otherwise you won't be able to do anything, let me teach you how to do it." After some guidance from Bai Fan, I was already Zhang Fei eating bean sprouts - a piece of cake. Three times and get it done, take a closer look, ha! It's really grand! To make it even more realistic, we installed a few small windows in the cockpit and made a lookout room! We cheered, jumped, put the boat into the water, want to see it in the water in the heroic, but out of our surprise, the boat does not move, as if against us. At this point, Densai exclaimed, "Ah! I forgot to make the motor! Sorry, hee hee hee hee!" White Sail and I both glared at him, then put the copper core and iron pieces inside the motor, then screwed the motor in place and mounted it on the boat. Next, the cannon and airplane were mounted on it. Ha! A model aircraft carrier was born. We put it into the water, only to see it swim quickly and happily swimming ......
Suddenly, I seemed to become a captain, standing in the boat I made, in the sea of scientific knowledge to roam.
5. Write a 600-word essay on the topic of scienceSince the last race between the tortoise and the hare, the tortoise won the championship, the tortoise is very proud, no matter where you go, always like to put on a champion look, feel very great.
The tortoise is not doing his job all day long, and he goes around attending speeches to talk about how he feels about winning the championship, and hears that he has to write a book called "The Tortoise's Road to the Championship" to publicize the good news that he has won the championship. It often came to the little rabbit's house to challenge it. It asked arrogantly, "Little rabbit, still dare to race with me?" The little rabbit said, "Brother Tortoise, I lost last time, but I won't necessarily lose this time."
The tortoise got angry and said, "How dare you talk to me like that? If you are not convinced, let's compete again!" The next day, the day of the second race between the tortoise and the hare, the weather was very sunny, the sky was cloudless, and even the air seemed extraordinarily fresh. Early in the morning, the square was crowded with people, red flags, drums and gongs, and there were sheep, piglets, deer - even the birds came to see the fun.
The race began, only to hear the elephant referee gave the order: "Ready - run!" Let us remember this sentence: modesty makes progress.
6. humanities and science sentiment relationship as the topic of writing a 1000-word essayThis is a great era, a great era requires great spiritual power to promote the development of the humanities and the spirit of science is just like the tide of this power of the two currents, the two waves, when they meet in the sea of our lives, and what will happen to the scene? The production and development of human society, the first to appear should be the survival of people and life, and then the emergence of humanities. In order to improve the quality of life and provide the guarantee of humanistic care, science and technology come into being. They are as different from each other as the sea creates waves and the new waves push the old waves, but they are inseparable. "To do a good job, one must first make good use of the tools". The advancement of science and technology is the catalyst to promote the realization of humanistic care and to improve the quality of life and efficiency. Remember the "three-year natural disaster" period in the early 1960s? At that time, the majority of farmers had no harvest, famine spread unchecked, and at that time, conscientious scholars and officials, do not want to give national humane care, but because of the backwardness of the level of science and technology, the distribution of food is almost like a daydream. In the 70's, like a loud bang shook the world, Yuan Longping cultivated indica hybrid rice, to meet the food needs of thousands or even hundreds of millions of people. This is not exactly the embodiment of science and technology to provide protection for human care? And just as the popular "ecological humanities" "low-carbon life", if there is no energy-saving hybrid cars, if there is no drip irrigation technology and other environmental technology invention, we talk about "love nature as love yourself! How can we talk about the slogan "Love nature as you love yourself"? Technology is like a new wave, constantly moving the old wave of humanity. Not all technology can be used to improve life and promote society, only with the spirit of humanism can technology play its proper role and be used to the fullest extent. Since the Second World War, a new type of energy - nuclear energy is popular around the world, less than a century, the world can almost hear about the "nuclear" discussion. Nuclear energy is a double-edged sword: in the hands of humane and conscientious people, it can be used to generate electricity, while in the hands of people with no conscience, it can be used to threaten mankind and destroy the planet. In this era, such examples abound, cloning technology, genetic modification technology, network technology and so on, these technologies can only be guaranteed by the humanities to play a huge positive energy, to promote the development of society. This is like the old wave of humanities against the new wave of science and technology, so as not to make it gush or drown. In the final analysis, science and technology come from life, based on life, and constantly promote the improvement of living standards is the fundamental purpose of scientific and technological development. The great inventor Thomas Edison, it is in the life of careful observation, full exploration, only to invent the electric light to replace the many disadvantages of oil lamps and gas lamps. In the same way, humanities is also based on life, and its purpose is to make life better. Life is like an ocean, constantly generating waves of technology and humanities. Humanities without the support of science and technology is an empty dream, life without science and technology as a driving force is a tired and inefficient crawl, while technology without humanistic conscience is a demon that smears the lives of the people, and humanities without life as the starting point and purpose is a flashy and useless waste and decoration. Humanities and science and technology originated from life and higher than life, we only use higher than the imagination and cognition of this era, to adapt to the emotions and thinking of this era, to devote ourselves to the cause of contributing to this era, the collision of humanistic feelings and scientific spirit into a fusion of the humanities, science and technology and the relationship between life can be correctly dealt with, and promote the human society of mankind to move forward, so that we in the community We can live a happier and more harmonious life in this society.
7. to science as the topic of writing a not less than 600 words of second year essayPhysics is a science based on experiments to study the most basic and general laws of material movement and the basic structure of matter and its applications.
I feel that studying physics is like exploring the mysteries of the world, no, it should be exploring. It broadens our horizons and stimulates our curiosity and inquisitiveness.
When I was in elementary school, because my hair was too long, I had to spend more time combing my braids in front of the mirror every morning after I got up, when I stumbled upon the following: when I raised my right hand, "I" in the mirror raised my left hand; when I closed my left eye, "she" closed her right eye. When I closed my left eye, "she" closed her right eye. I was full of questions in front of the mirror to do a variety of actions to manipulate a variety of poses, the mirror "I" did exactly the opposite of what I did, I was surprised, this is how it is in the end? So, I immediately went to the bookstore to look through a lot of books and information, but unfortunately, because I do not know this phenomenon belongs to which discipline which kind of knowledge, the results of a busy afternoon did not get any answer.
So, I went upstairs to ask a sixth-grade brother, I thought he was a sixth-grader, will know more than me, who knows he also said I do not know, I hold the belief that not to achieve the goal will never stop finally from the nature teacher to understand a little: "This is the plane mirror imaging original.
8. to science and technology as the topic of the compositionI was in the second grade, my family bought a computer, I was immediately attracted to the flashing color images. At that time, no one in the family knows about computers, mom in accordance with the instructions step by step will be randomly carried "happy home" software installed, and repeatedly urged me not to move the computer, so as not to break. I still can't help it, while my mom is not paying attention to go up to "play" a computer, this time in trouble, want to let my mom know can't, because I put my mom half a day's effort to load in the "happy home" uninstalled all. I was reprimanded at the time. The initial good feeling that the computer had given me was gone in a flash. I hated the computer, I saw it as a monster, and I often blamed my mom for buying a piece of junk and putting it in the house to take up space. Since then, I ignored the computer. Until the fifth grade we opened the information technology class, so that I have a love for computers. Issued a new book I do not even look at a glance, just when the class had no choice, had to listen. One class changed my mind about it. Information technology allows me to understand that the computer is a machine to process information instead of the human brain, it is also the same as the human brain to input information, memory information, processing information, output information, only these functions I have not mastered it, just like people will not use their eyes to observe things, will not use the brain to see things to remember, will not go to think about what is remembered in the brain, and even more will not think about the results of the paper, the results are not very sad? This result is not very sad, isn't it? With the growing understanding of information technology, my attitude towards computers has changed. It doesn't seem to be so annoying, the ugly monster in the eyes of the past has turned into a smart brain, and information technology enables it to show its functions to the fullest in front of my eyes. I can rely on the information technology I have learned to design a homework schedule for the class, which also inserts a beautiful pattern; I can enter all my essays into the computer to prepare a book; I can make a simple slide show, FLASH; I can also chat on the Internet to play interactive games. Information technology can help me do a lot of countless things, is that it makes me and the computer has formed a bond, although I am now studying tense, but every day, no matter how late I will open the computer addiction, one is to review the mastery of information technology, and the second is to take it easy after the tension. Information technology has become my leisure and entertainment tools. In addition, it is a good helper in my study, and I can go online to find answers to the questions I don't understand. Especially after my mom bought me a literary star electronic dictionary, information technology is a great help, it makes the electronic dictionary has become my personal "teacher". I love information technology, and I hope that it can bring joy and convenience to everyone
9. Write an essay on the topic of science"Write an essay on the topic of science"
By: ex-exoduscomposition.com /
Whenever I go to school and after school, I look at my fourth-grade book in the window. wind chime, a small invention I made over the summer.
It was the summer vacation of the fourth grade, and I had finished many of my assignments, and only the small production of this homework made me hurt my head. Once, I inadvertently saw a box in the living room has expired "Sanjing brand blue bottle of oral fluid", I was curious to go over, open a look, full, only drink a bottle! I looked at these delicious oral fluid, want to drink, but it has expired. Throw it away, but also feel pity, what to do? I had an idea: "I can pour out the expired oral fluid in the bottle, and collect the outside bottles to make a beautiful wind chime." .
I took the bottle out of the box first, stabbed a small hole in the mouth with scissors, and then turned the bottle down, letting the oral fluid pour out little by little, and then put the bottle on the table after all the oral fluid was poured out. From home, I found some unused cardboard and double-sided tape from my previous art class, as well as woolen thread, scissors and other tools. When everything is ready, we will officially start to make it.
My mind flashed back to the many wind chimes I'd seen at the store, but I just didn't know what kind of wind chime to make. I searched through a lot of art books and finally found the "Underwater World" wind chime in my third grade art book. My mom and I talked about it for a long time and decided to make it.
First, I used a piece of blue cardboard, cut it into a circle, then cut off a sharp corner of the circle, and then glued the two sides of the corner I just cut off with double-sided tape, so that it became a funnel shape. Next, it was time to make the pendants. The pendants were all kinds of underwater creatures. I drew a big crab on a piece of red cardboard, holding up its big, strong feet and bulging a pair of big eyes! I cut it out carefully with scissors. Then cut a big fat carp, a small turtle with a thick shell on its back ...... and then prepare some lengths of various colors of wool, and glue one on the back of each creature. Next is to hang a bottle underneath each creature, this can be me did, how can I hang the bottle steadily on it? How can I hang the bottle securely? If I put it directly on the bottle mouth, it doesn't look good, and the bottle is glass, so I can't make a small hole underneath, so what should I do? I looked at the bottle and fumed. Suddenly, my eyes fell on the toothpick on the table, I had a bright idea, I divided the toothpick into two sections, picked up a section, tied with wool from the center, then put the toothpick diagonally into the mouth of the bottle, and lifted the wool up. The bottle was hanging steadily. I used the same method to hang all the bottles. Finally, put all the wool attached to the creature and the bottle through the center of the funnel and twist it into a strand. Thus a beautiful wind chime was ready. I was happy to take it to my mother to see, my mother also especially like, straight to praise me to do really good, and with me to hang it in the living room.
Every time I go to the living room, I always look at my wind chime. Whenever the wind blows, my wind chime sings "ding dong, ding dong" and dances in the wind.
Written by: 前出塞作文网 /