drainage ditch

例句：

1. 1. The drainage ditch is filled with water after heavy rain.
   暴雨过后，这条排水沟里积满了水。
2. 2.The city has a network of underground drainage ditches to prevent flooding.
   这个城市有一套地下排水系统，以防洪水。
3. 3.The construction crew was working on the drainage ditch when it collapsed.
   施工队在修排水沟时，它突然塌陷了。