胃与肠的

例句：

1. 1. The stomach is the first part of the digestive system.
   胃是消化系统的第一部。
2. 2.The doctor advised him to eat a small amount of food every day to maintain his health.
   医生建议他每天吃少量的食物来保持健康。
3. 3. Gastric acid plays an important role in digestion.
   胃酸在消化过程中起着重要的作用。