head off

• • 拦截，上前拦住(使其转向或退回):

    The running thief was headed off by the police.

    那名夺路飞逃的小偷让警察给拦截住了。

  • 摆脱(跟踪者)；使改变话题:

    From my house out, you have to head off several tails.

    从我这儿出去，你得抛掉几个尾巴。

    It's difficult to head her off when she talked about her dissolute life.

    要是她谈起她的风流韵事来，你就别想岔开她的话题。

  • 防止；回避:

    It's better for you to head off his coming.

    你最好别让他来。

    Talking with her, you'd try to head off your happy marrige.

    和她交谈时你最好设法不去谈你的幸福的婚姻生活。

  • 赶在别人之前到达(某一重要地方):

    It's important to head off the enemy from the airport.

    抢在敌人之前占据飞机场是至关重要的。