overflow spring

例句：

1. 1. The overflow spring wasdesigned to prevent water from flowing back intothe reservoir during heavy rainfall.
   溢流式水闸设计用来在大雨时防止水流回水库。
2. 2. The engineers had toreplace the old overflow spring with anew one that could handle more water.
   工程师们不得不用一个新的溢流式水闸来替换旧的，它能处理更多的水。
3. 3. Theoverflow spring is crucial formaintaining the stability of the riverbed.
   溢流式水闸对于保持河床的稳定性至关重要。