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201. distinct from 与截然不同 202.distinguish between distinct from 与截然不同 202.distinguish between 辨别 203.distinguish...from 把与区别开 204.do away with 除去，废除，取消; do away with 杀掉，镇压 205.have...to do with 与有关系 206.without doubt 无可置疑地 207.in doubt 对表示疑惑 208.be due to 是由于 209.come off duty 下班 210.go on duty 上班 211.be on duty 值班，值日，在上班时 212.be in duty bound to 有义务(做) 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 | 
