water proof dam

例句：

1. 1. The engineers designed a waterproof dam to prevent floods during the construction phase.
   工程师们设计了一个防水堤坝，以防止建设期间的洪水。
2. 2. The new reservoir is equipped with a water-impervious dam to store rainwater for irrigation purposes.
   新水库配备了一个防水堤坝，用于储存雨水进行灌溉。
3. 3. The dam was constructed using high-quality materials to ensure its water-resistant properties.
   该堤坝使用了高质量的材料来确保其防水性能。