dredged trench

例句：

1. 1. The engineer dredged the river to create a new channel.
   工程师挖掘河流以创造新的航道。
2. 2. The construction crew had to dredge the foundation for the new bridge.
   施工队不得不挖掘新桥的基础。
3. 3.The flood caused extensive damage and necessitated the dredging of the trench.
   洪水造成了广泛的损害，并需要挖掘沟渠。