gastral cavity

例句：

1. 1. The stomach is the first part of the digestive system where food is broken down.
   胃是消化系统的第一部，食物在这里被分解。
2. 2. The gastric acid helps to break down proteins and fats in the stomach.
   胃酸有助于在胃中分解蛋白质和脂肪。
3. 3. Gastric cancer is a serious disease that can be treated with surgery and chemotherapy.
   胃癌是一种严重的疾病，可以通过手术和化疗来治疗。