overflow well

例句：

1. 1. The overflow well is designed to prevent water from flowing over the edge of the reservoir.
   溢流井的设计是为了防止水库边缘的水溢出。
2. 2. The siphon was used to collect rainwater from the rooftop.
   抽水机被用来从屋顶收集雨水。
3. 3. The drain was blocked, causing a significant amount of water to accumulate in the basement.
   排水沟被堵塞了，导致大量积水在地下室。