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选修8unit21．Adifferfrom/withBon/aboutsthAB关于…意见不同AandBdifferin=AdifferfromBin=AbedifferentfromBinAB在…方面不同2．beofbenefitto=bebeneficialto=AbenefitB=BbenefitfromA对…有益3．makeacopyof=copy复制4．fromtimetotime=attimes有时innotime立刻atnotime绝不anothertime下一次aheadoftime提前5．alargequantityof+C/U+单谓largequantitiesof+C/U+复谓6．do/makeresearchon对…进行研究7．failtodo没能做成succeedindoing成功做成8．undertake(doing)sth承担，着手做undertaketodosth答应做选修8unit29．attempttodo尝试做10．payoff还清；取得好结果pay(sb)forsth为…付钱payback偿还（欠款）payavisitto拜访11．divide…into把…分成separate…from…把…和…分开12．be/feelcastdownby对…感到沮丧13．beappropriatefor/to适合…14．altogether总共；完全的；总的说来15．haveanimpact/effect/influenceon对…有影响=affect/influence16．makecorrections=correct改正17．raise/have/makeanobjectionto(doing)sth=objectto(doing)sth反对18．openone’seyesto使…关于…长见识19．raisequestions提出问题20．forbid(doing)sthforbidsbtodo=sb(from)doing禁止21．harmsb=doharmto=beharmfulto对…有害22．beinfavourof=befor=standby支持，赞成dosbafavour帮助某人选修8unit223．inmanyaspects在很多方面24．compareAwithB把A和B相比compareAtoB把A比作Bbecomparedwith/to和…相比25．owesbsth=owesthtosb欠…；把…归功于owingto=dueto=asaresultof由于26．retirefrom从…退休27．lookbackon回顾，追忆28．bebotheredabout为…烦恼Don’tbother不用麻烦29．beboundtodo一定会30．debateover对…争论31．havenoidea不知道32．strike…intoone’sheart(s)使…刻骨铭心be/goonstrike罢工sthstrikesbitstrikesbthat某人突然想起33．experimentwith对…进行实验34．bring(…)backtolife使…苏醒，恢复生机…comebacktolife…苏醒，恢复生机35．makealleffortstodo=makeeveryefforttodo=tryone’sbesttodo尽全力做选修8unit236．bevainof/about为…感到骄傲invain白费力气37．takefulladvantageof=makefulluseof=makethebest/mostof充分利用38．can’tresistdoing忍不住39．passon…to…把…传给…passby经过passaway去世，过去40．drawbackto/of…的缺点41．restore…to…使…恢复成…；把…归还给…42．beunabletodo不能43．bythesea沿海bysea乘船44．appealto吸引，上诉，请求45．ingood/poorcondition状况好/差onthat/thiscondition在…情况下onnocondition绝不onconditionthat条件是46．beconvincedof确信47．bereasonableabout对于…通情达理48．inthemeanwhile/meantime与此同时49．overandoveragain一次又一次选修8unit250．