isthmus of auditory tube

例句：

1. 1.The narrow isthmus connects the two countries.
   狭窄的海峡将两国连接起来。
2. 2. The isthmus is a popular tourist destination.
   海峡是一个受欢迎的旅游目的地。
3. 3.The isthmus is home to many rare species of fish.
   海峡是许多稀有鱼类的家园。