1.abigheadache令人头痛的事情2.afractionof一部分3.amatterofconcern焦点4.aseriesof一系列,一连串aboveall首先,尤其是5.absentfrom不在,缺席6.abundantin富于7.accountfor解释8.accusesb.ofsth.控告9.addto增加（addupto）10.afterall毕竟,究竟11.agreewith同意12.aheadoftime/schedule提前13.aheadof在...之前（aheadoftime提前）14.aliento与...相反15.allatonce突然,同时16.allbut几乎;除了...都17.allofasudden突然18.alloveragain再一次,重新19.allover遍及20.allright令人满意的;可以21.allthesame仍然,照样的22.allthetime一直,始终23.angrywithsb.at/aboutsth.生气,愤怒24.anxiousabout/for忧虑,担心25.anythingbut根本不26.apartfrom除...外(有/无)27.appealto吸引，申诉，请求28.applicableto适用于29.applyto适用30.appropriatefor/to适当,合适31.approximateto近似,接近32.aptat聪明,善于33.aptto易于34.aroundtheclock夜以继日35.asamatteroffact实际上36.asaresult(of)因此,由于37.asarule通常,照例38.asfaras...beconcerned就...而言39.asfaras远至,到...程度40.asfollows如下41.asfor至于,关于42.asgoodas和...几乎一样43.asif好像,防腐44.asregards关于,至于45.asto至于,关于46.asusual像平常一样,照例47.aswellas除...外(也),即...又48.aswell同样,也,还49.ashamedof羞愧,害臊50.asidefrom除...外(还有)51.askforthemoon异想天开52.ataloss茫然,不知所措53.atatime一次,每次54.atallcosts不惜一切代价55.atallevents不管怎样,无论如何56.atalltimes随时,总是57.atall丝毫(不),一点也不58.atanyrate无论如何,至少59.atbest充其量,至多60.atfirstsight乍一看,初看起来61.atfirst最初,起先62.athand在手边,在附近63.atheart内心里,本质上64.athome在家,在国内65.atintervals不时,每隔...66.atlarge大多数,未被捕获的67.atlast终于68.atleast至少69.atlength最终,终于70.atmost至多,不超过71.atnotime从不,决不72.atonetime曾经,一度;同时73.atpresent目前,现在74.atsomeone'sdisposal任...处理75.atthecostof以...为代价76.atthemercyof任凭...摆布77.atthemoment此刻,目前78.atthisrate照此速度79.attimes有时,间或80.awareof意识到81.backandforth来回地,反复地82.backof在...后面83.backup后备,支援84.bareof几乎没有,缺乏85.beabletodo能够86.bearound差不多87.beavailabletosb.可用,可供88.beboundto一定89.becapableofdoing能够90.beconcernedwith关心…，涉足…91.bedyingto渴望92.befedupwith受够了betiredof93.beinhospital住院94.beinseason上市的/inpeakseason旺季95.beinthemoodtodosth.想做96.bepressedfortime时间不够97.betiedupwith忙于98.beundertheweather身体不好99.beataroundthebush拐弯没角100.beatthecrowd避开人群101.beforelong不久以后102.behindschedule误点103.bentonsth.下定决心做…104.besidepoint离题的,不相干的105.beyondone'sability超越某人的能力106.beyondquestion毫无疑问107.bookonreserve须留的图书108.bookedup订完了109.boundfor开往110.breakdown抛锚111.breakthough突破112.breakupwith和某人分手bethroughwith/befinishedwith113.bringabout使…发生114.bringsomeoneuptodate帮某人赶上helpsomeonecatchup115.byaccident偶然116.byair通过航空途径117.byallmeans尽一切办法,务必118.byandby不久,迟早119.bychance偶然,碰巧120.byfar最,...得多121.byhand用手,用体力122.byitself自动地,独自地123.bymeansof用,依靠124.bymistake错误地,无意地125.bynomeans决不,并没有126.byoneself单独地,独自地127.byreasonof由于128.bytheway顺便说说129.byvirtueof借助,由于130.bywayof经由,通过...方法131.calloff取消132.callon号召,邀请,点某人的名,拜访133.capableof能够134.carefulof/about/with小心,注意135.certainof/about确信,肯定136.chairameeting主持会议137.chargesb.withsth.控告138.clearof没有,不接触139.cleverat善于140.closeto接近,亲近141.comeincontactwith与…取得联系142.comeoutofsth.alive大难不死14...