dam pass structure

例句：

1. 1. The dam is a crucial part of the flood control system.
   大坝是防洪系统的重要组成部分。
2. 2. The construction of the dam has been completed successfully.
   大坝的建设已经成功完成。
3. 3. The dam is designed to store water during floods.
   大坝设计用来在洪水期间储存水。