flood tide gate

例句：

1. 1.The floodgates were opened to allow more water to flow through the city.
   打开洪水闸门，让更多的水流过城市。
2. 2.The floodgates are closed, preventing any further flooding.
   洪水闸门关闭了，防止进一步的洪水。
3. 3. The floodgates are a symbol of the city's resilience in the face of natural disasters.
   洪水闸门是城市面对自然灾害时韧性的象征。