膈膜

例句：

1. 1. The doctor advised him to stay in bed and rest for a few days.
   医生建议他卧床休息几天。
2. 2. The scientist studied the structure of the vertebrate nervous system.
   科学家研究了脊椎动物神经系统的结构。
3. 3. The patient was given medication to relieve his chest pain.
   病人被开了药来缓解他的胸痛。