drop gate sluice

例句：

1. 1.The drop gate sluice is designed to control the flow of water in this area.
   这个区域的闸门是用来控制水流的。
2. 2.The engineers carefully inspected the drop gate sluice before they began work on the project.
   工程师们在开始这个项目之前仔细检查了泄水闸。
3. 3.The drop gate sluice was a crucial part of the flood control system.
   泄水闸是防洪系统的关键部分。