fixed overflow dam

例句：

1. 1. The engineers designed a fixedoverflow dam to control the floodwaters.
   工程师们设计了一个固定溢洪道坝来控制洪水。
2. 2.The construction of the fixedoverflow dam was completedin two years.
   固定溢洪道坝的建设在两年内完成。
3. 3. Thefixed overflow dam is an essentialstructure for flood control.
   固定溢洪道坝是防洪控制的重要结构。