fall out
... (外)侧的;旁边的:lateral (头发,牙齿)脱落;掉;掉下来;掉队;(队伍)原地解散;不和;吵翻了:fall out (同时)普遍存在的,无处不在的:ubiquitous ...
fall behind
... catch up with 赶上,追上 fall behind 落后,掉队 go over 复习,仔细查看,走到另一边,改变立场 ...
lag behind
... press for 再三请求,紧急要求 lag behind 掉队 exert oneself 努力 ...
fall behellond
....中英文都有的... drop out 退出,脱离队伍 fall behellond 掉队 fall out 争吵;成果是 ...
[drop out;fall behind] 落在队伍的后面。比喻跟不上时代或达不到要求的水平