211. be on duty 值班, 值日, 在上班时

　　212. be in duty bound to (do) (=be required by one’s job or esp. by conscience) 有义务(做)

　　213. be eager for 想得到, 盼望

　　214. by ear (=play music from memory without having seen it printed) 凭记忆,不看乐谱

　　215. have an ear for (=have keen recognition of sounds esp. in music and language)对..有鉴赏力

　　216. a word in one’s ear 私房话, 秘密话

　　217. on earth 究竟, 到底, 全然

　　218. with ease ( = easily) 容易, 不费力

　　219. at (one’s) ease ( = without worry or nervousness) 自在,不拘束

　　220. put sb. at his her ease (=free sb. from worry or nervousness)使某人感到无拘束

　　221. economize on (=save sth. instead of being wasteful) 节省

　　222. have an effect on 对…有影响

　　223. be in effect (=be in operation) 有效

　　224. go into effect 生效. ( 近 come into effect; take effect; be brought into effect)

　　225. in effect (=in fact, really) 实际上

　　226. give effect to (=carry out) 实行,使…生效

　　227. to no effect 不起作用,没有取得任何效果

　　228. (be) of no effect (=useless) 无效

　　229. to the effect that 大意是…,主要内容是…

　　230. to that effect 是那个意思的…

　　231. emerge from ( =appear, become known ) 出现, 暴露(问题. 意见等)

　　232. place(or put, lay) an emphasis on 强调, 把重点放在…上

　　233. encourage sb. in 鼓励; encourage sb. in hisher work 鼓励某人工作; encourage sb. in hisher idleness 怂恿某人游手好闲

　　234. encourage sb. in …with sth. 用…鼓励某人做某事

　　235. on end (=continuously) 连续地

　　236. (be) at an end (=finished) 结束了