围堰

例句：

1. 1. The engineers were busy constructing a new dam to protect the river from floods.
   工程师们忙于建造一座新的大坝，以保护河流免受洪水侵袭。
2. 2. The construction of the dam was completed successfully, and the water levels in the reservoir have stabilized.
   大坝的建设成功完成，水库中的水位已经稳定下来。
3. 3. The engineers used a combination of materials to create a strong and durable dam that could withstand extreme weather conditions.
   工程师们采用多种材料组合，制造了一座坚固耐用的堤坝，能够抵御极端天气条件。