concrete cofferdam

例句：

1. 1. The construction of the concrete cofferdam was completed ahead of schedule.
   混凝土围堰的建设提前完成了。
2. 2. The engineers had to reinforce the concrete cofferdam to withstand the floodwater pressure.
   工程师们不得不加固混凝土围堰以承受洪水压力。
3. 3.The concrete cofferdam was designed to protect the nearby riverbank from erosion.
   混凝土围堰的设计是为了保护附近的河岸免受侵蚀。