jump at(=to be eager to accept)抢着接受
jump on(=scold，tell of)叱责
junior to sb. 年纪较…轻，职位较…低
(be)keen on 喜爱，渴望
keep a close watch on(=keep a sharp look out for)密切注视
keep…to oneself(=keep secret)不告诉别人
to(the best of)one’s knowledge 据…所知
at large(=at liberty，free)在逃，逍遥法外;at large(=in general)一般来说，大体上;at large(=at full length; with details)详细地
lean against( 背 ) 靠 着 …
at least 至少;at most 至多
(not)in the least 一点(也不)，丝毫(也不)
at one’s leisure 在…有空的时候
lend itself themselves to 适合于(某用途)
at length(=after along time，at last)终于；at length(=in detail，thoroughly)详细地
go to any length 想一切办法，尽一切力量
