Eustachian tube

例句：

1. 1. The doctor advised her to have the Eustachian tube surgery.
   医生建议她进行耳咽管手术。
2. 2.The child's Eustachian tube was blocked, causing difficulty in breathing.
   孩子的耳咽管被阻塞，导致呼吸困难。
3. 3.During sleep, the Eustachian tube can become partially or completely blocked, which can lead to ear infections.
   睡眠时，耳咽管可能会部分或完全堵塞，导致耳部感染。