The second sentence means that if you want to live a long and healthy life, you can't have shit in your intestines. The defecation here means that you haven't defecated for several days, which is what people often say.
Extended data:
Dietary precautions:
1, develop good eating habits. Don't wolf down your food. Don't do anything else while eating, don't chase each other, don't fight; Three meals a day are regularly quantified. Don't overeat.
2. Develop the habit of washing hands before eating. Human hands do this and that every day, touching all kinds of things. Can infect bacteria, viruses and parasite eggs. Wash your hands carefully with soap before eating to reduce the possibility of "oral discomfort".
Once the food is ready, you should eat it as soon as possible. It is dangerous to eat cooked food stored at room temperature for 45 hours.
4. Keep the kitchen clean. Clean kitchen utensils, knives, forks and tableware with a clean cloth. This kind of wiping cloth should not be used for more than one day, and it should be scalded with boiling water before use. If possible, don't wipe the cloth, but wash the tableware with tap water and dry it.
5. Keep insects, rabbits, mice and other animals away from food. Animals usually carry pathogenic microorganisms.
6. Don't eat wild vegetables and fruits. There are many kinds of wild vegetables and fruits, some of which contain toxins harmful to human body, so it is difficult for inexperienced people to distinguish them clearly. Only by not eating wild vegetables and fruits can we avoid poisoning and ensure safety.