掘壕沟

例句：

1. 1. The workers dug a deep hole to plant the trees.
   工人们挖了一个深洞来种植树木。
2. 2. The farmer digs potatoes in his garden every morning.
   农民每天早上在他的花园里挖土豆。
3. 3. The children are digging holes in the sandbox for their sandcastles.
   孩子们在沙箱里挖洞，为他们的沙堡做准备。