caisson gate

例句：

1. 1.The construction crew had to install a new caisson gate before the flood season began.
   在洪水季节开始之前，施工队必须安装一个新的沉箱门。
2. 2.The engineers were concerned about the potential damage that could be caused by the caisson gate.
   工程师们担心沉箱门可能带来的潜在损害。
3. 3. The caisson gate was designed to protect the riverbed from flooding during high water levels.
   沉箱门的设计是为了在高水位时保护河床免受洪水侵袭。