“挖战壕”造句

在三角洲挖战壕有什么用?
What is the use of digging trenches in the Delta?

他们在挖战壕以免受炮火的袭击.
They were digging trenches to shelter the men from gunfire.

他们还来不及挖战壕就受到了攻击.
They were attacked before they had time to dig in.

• #挖战壕