floating underflow trap

例句：

1. 1. The engineer designed a floating underflow trap to prevent water from flowing into the river during heavy rainfall.
   工程师设计了一个浮动下溢堰，以防止在暴雨期间河水流入河流。
2. 2.Floating underflow traps are commonly used in flood control systems to divert excess water away from homes and businesses.
   浮动下溢堰常用于洪水控制系统中，将多余的水引导远离住宅和商业区。
3. 3. During construction, engineers carefully placed the floating underflow trap to ensure it is stable andeffective in preventing flooding.
   在施工过程中，工程师们仔细放置了浮动下溢堰，以确保其稳定且能有效防止洪水。