behind/ bɪ'haɪnd /

1.preposition
(at the back of) 在…后面

Behind the cottage was a shed.
在小屋的后面是一个棚子。
2.preposition
(supporting) 支持

The country is behind the President.
整个国家都支持总统。
3.preposition
(in race,career etc) 落后于

4.preposition
(responsible for) 对…负责

It is not clear who is behind the killing.
谁是这次谋杀的幕后策划者,目前尚不清楚。
5.adverb
(at/towards the back) 在/向后面

I sat in the front row and Mick sat behind.
我坐在前排,米克坐在后面。
6.adverb [stay] [ wait+] 
留在原处

Afterwards Ian asked me to stay behind.
后来,伊恩叫我留在原处。
7.noun [inf] 
(buttocks) 屁股

to be behind (schedule)
落后于(计划)
we're behind (them) in technology
在技术方面,我们没有(他们)那么好
to get behind
落后
to leave sth behind
落下
to get left behind
 [person+] 被甩掉