211. be on duty 值班，值日，在上班時
212. be in duty bound to （do）（=be required by one's job or esp. by conscience）有義務(wù)（做）
213. be eager for 想得到，盼望
214. by ear（=play music from memory without having seen it printed）憑記憶，不看樂譜
215. have an ear for （=have keen recognition of sounds esp. in music and language）對……有鑒賞力
216. a word in one's ear 私房話，秘密話
217. on earth 究竟，到底，全然
218. with ease（= easily）容易，不費力
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）使某人感到無拘束
221. economize on（=save sth. instead of being wasteful）節(jié)省
222. have an effect on 對…有影響
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）實際上
226. give effect to（=carry out）實行，使…生效
227. to no effect 不起作用，沒有取得任何效果
228. （be）of no effect（=useless）無效
229. to the effect that 大意是…，主要內(nèi)容是…
230. to that effect 是那個意思的…
231. emerge from（=appear，become known ）出現(xiàn)，暴露（問題，意見等）
232. place（or put，lay）an emphasis on 強(qiáng)調(diào)，把重點放在…上
233. encourage sb. in 鼓勵；encourage sb. in hisher work 鼓勵某人工作；encourage sb. in hisher idleness 慫恿某人游手好閑
234. encourage sb. in …with sth. 用…鼓勵某人做某事
235. on end（=continuously）連續(xù)地
236. （be）at an end （=finished）結(jié)束了
237. no end of （=very manymuch）很多，大量
238. in the end （=finally，eventually）最終
239. at one's wit's end（=not knowing what to do or to say）無法可想，智窮計盡
240. end up with 以…而結(jié)束
212. be in duty bound to （do）（=be required by one's job or esp. by conscience）有義務(wù)（做）
213. be eager for 想得到，盼望
214. by ear（=play music from memory without having seen it printed）憑記憶，不看樂譜
215. have an ear for （=have keen recognition of sounds esp. in music and language）對……有鑒賞力
216. a word in one's ear 私房話，秘密話
217. on earth 究竟，到底，全然
218. with ease（= easily）容易，不費力
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）使某人感到無拘束
221. economize on（=save sth. instead of being wasteful）節(jié)省
222. have an effect on 對…有影響
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）實際上
226. give effect to（=carry out）實行，使…生效
227. to no effect 不起作用，沒有取得任何效果
228. （be）of no effect（=useless）無效
229. to the effect that 大意是…，主要內(nèi)容是…
230. to that effect 是那個意思的…
231. emerge from（=appear，become known ）出現(xiàn)，暴露（問題，意見等）
232. place（or put，lay）an emphasis on 強(qiáng)調(diào)，把重點放在…上
233. encourage sb. in 鼓勵；encourage sb. in hisher work 鼓勵某人工作；encourage sb. in hisher idleness 慫恿某人游手好閑
234. encourage sb. in …with sth. 用…鼓勵某人做某事
235. on end（=continuously）連續(xù)地
236. （be）at an end （=finished）結(jié)束了
237. no end of （=very manymuch）很多，大量
238. in the end （=finally，eventually）最終
239. at one's wit's end（=not knowing what to do or to say）無法可想，智窮計盡
240. end up with 以…而結(jié)束