head off

To block the progress or completion of; intercept

拦截：阻挡…的进程或完成；拦截

Try to head him off before he gets home.

在他回到家之前截住他

be banging (或 knocking) one's head against a brick

be doggedly attempting the impossible and suffering in the process

硬做不可能成功的事；劳而无功

bang (或 knock) people's heads together

reprimand people severely, especially in an attempt to stop them arguing

（尤指阻止争吵时）严厉斥责争吵者

be hanging over someone's head

(of something unpleasant) threaten to affect someone at any moment

（不愉快之事）随时威胁

be on someone's own head

be someone's sole responsibility

（应）由某人负全责

bite (或 snap) someone's head off

reply sharply and brusquely to someone

抢白

by the head

(Nautical)(of a boat or ship) deeper in the water forward than astern

(航海)（船）船首比船尾吃水深

the &I{Boy Andrew} went down by the head.

“安德鲁男孩号"船头朝下沉没。

come to a head

reach a crisis

发展到危急关头

the violence came to a head with the deaths of six youths.

随着六名年轻人的死亡，暴力行为发展到了危急关头。

do someone's head in

(Brit. informal)cause someone to feel annoyed, confused, or frustrated

(英，非正式)使生气，使糊涂，使气恼

enter someone's head

[usu. with negative]occur to someone

被某人想到（或想起）

such an idea never entered my head.

我从没想到过这个主意。

from head to toe (或 foot)

all over one's body

从头到脚，全身

I was shaking from head to toe.

我浑身发抖。

get one's head down Brit. informal 英，非正式

sleep

睡觉

concentrate on the task in hand

聚精会神地做手头的工作

get one's head round (或 around)

[usu. with negative](informal)understand or come to terms with something

(非正式)搞明白；想通（不快或不幸之事）

I just can't get my head around this idea.

这种观点我就是想不通。

give someone his(或 her) head

allow someone complete freedom of action

让…放手干