气肿

例句：

1. 1. The patienthad a gastric ulcer andwas experiencing severe pain.
   病人患有胃溃疡，并感到剧烈疼痛。
2. 2. Thechild's stomach wasbloated, making itdifficult for him to eat.
   孩子的肚子鼓胀，让他难以进食。
3. 3. The airin the room was stagnant, causing everyone to feel short of breath.
   房间里的空气静止不动，让每个人都感到呼吸困难。