trench

n. 沟,沟渠
v. (挖)沟,(挖)战壕

Grandfather was in the trenches during the First War.

在第一次世界大战中，我祖父驻守在法国北部前线。

I forgot to dig a trench around the tent.

我忘了在帐篷四周挖一条沟。