adjustable weir crest

例句：

1. 1. The adjustable weir crest is designed to control the flow of water during floods.
   可调节的堰顶设计用于洪水期间控制水流。
2. 2.The engineers carefully adjusted the adjustable weir crest to ensure optimal performance.
   工程师们仔细调整了可调节的堰顶，以确保最佳性能。
3. 3. During construction, the adjustable weir crest was crucial in preventing flooding.
   在建设过程中，可调节的堰顶在防止洪水中起着关键作用。