compound weir

例句：

1. 1.The compound weir is a crucial part of the flood control system.
   复合堰坝是防洪系统的关键部分。
2. 2. The engineers designed the compound weir to divert the flow of water.
   工程师们设计了复合堰坝来引导水流。
3. 3. The compound weir was built to prevent flooding during heavy rains.
   复合堰坝被建造来防止大雨期间的洪水。