介词 prep.1.在...的背后;在...的后面;向...的背后There is a garden behind the house. 屋后有个花园。

2.落后于,不如George always falls behind his schedule. 乔治老是不能按时完成计划。3.迟于;晚于She arrived at the office ten minutes behind her usual time. 她到办公室时比往常晚了十分钟。4.支持The senators are fully behind his welfare policy. 参议院的议员们完全支持他的社会福利政策。副词 ad. 1.在背后;向背后Mary drove. Her ten-year-old daughter sat behind. 玛丽开车,她的十岁的女儿坐在背后。2.(留)在原处;(遗留)在后Both of them stayed behind. 他们两个留下未走。3.迟;落后[(+with/in)]We are lagging far behind. 我们大大落后了。