head off

vt. 阻止(阻拦, 绕道前进)

例句与用法：

The first thing to be done was to head off the enemy from the tender spots and vital places.

首先要做的事是防止敌人从防守不严的部位及要害地方逃走。

I only asked you a question. There's no need to bite my head off.

我只是问你一个问题。你何必对我这么凶。

He'll talk your head off if you give him a chance.

他一有机会就会对你说个没完。

Don't expect me to sit here like a good boy while Smith is up there talking his head off.

不要指望我会像个乖孩子地坐在这儿，而史密斯在那里唠叨个没完。