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211. be on duty 值班, 值日, 在上班时 212. be in duty bound to 有义务 213. be eager for 想得到, 盼望 214. by ear 凭记忆,不看乐谱 215. have an ear for 对..有鉴赏力 216. a word in ones ear 私房话, 秘密话 217. on earth 究竟, 到底, 全然 218. with ease 容易, 不费力 219. at ease 自在,不拘束 220. put sb. at his / her ease 使某人感到无拘束 221. economize on 节省 222. have an effect on 对有影响 223. be in effect 有效 224. go into effect 生效. 225. in effect 实际上 226. give effect to 实行,使生效 227. to no effect 不起作用,没有取得任何效果 228. of no effect 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 出现, 暴露 232. place an emphasis on 强调, 把重点放在上 233. encourage sb. in 鼓励; encourage sb. in his/her work 鼓励某人工作; encourage sb. in his/her idleness 怂恿某人游手好闲 234. encourage sb. in with sth. 用鼓励某人做某事 | 
