Youth is a Chinese word which means spring. Spring is full of lush vegetation and green color, so it is called youth. Young, three refers to age, years, and four refers to good times; Precious years, five fingers wine, six fingers youth; Seven refers to a stage from psychological immaturity to maturity. From "Songs of the South": "Youth fades, the sun shines only".
Basic explanation
(1) Youth. The most unrestrained time.
② It is also used to describe the resurrection of old things.
(3) refers to the age category nouns of teenagers and young people.
(4) Spring is lush and full of green, so it is called youth (also called summer). In the green spring, I began to go home. -Tang Du Fu's "Imperial Army Recovers the Banks of the Yellow River".
Adolescence refers to the stage when an individual's sexual function changes from immaturity to maturity. In biology, it refers to the transition period from immature to mature, that is, the transition period from children to adults. During this period, my personality is mature and I can have children. It can be seen that adolescence is mainly a stage of physiological maturity, which overlaps with the stages of life divided from psychological or social aspects.
In the stage of human growth and development, adolescence accounts for half or even more time. Puberty has no consistent age range in different countries, and generally refers to 13, 14-17 and 18 stages. Psychologically, it is also called pre-adolescence, which is equivalent to the middle school stage in pedagogy and is characterized by rapid physical growth. In addition to adolescence, adolescence will last until the age of 25-30.
Because the sexual maturity of men is about one year later than that of women, it can be determined that the puberty age range of men is 14- 18 years old. 1 ~ 2 years too early or too late is normal. Men of this age are usually called boys, while women of the same age are called girls. Adolescents in adolescence not only have obvious changes in physiology, but also often have great changes in psychology.