At(prep.)atatime一次，每次atbreakfast早餐时，正在吃早饭atfirst最初atlast最后，终于atleast至少at(the)most至多，不超过atonetime以前，曾经atonce立刻，马上,一次atnight在夜里，在晚上atmidnight在半夜atpresent目前，现在attimes有时候atthelatest最迟attheheadof在……的前头atthemoment此刻atthesametime同时athome在家atsea在大海上，在航行atthebottom在底端attheend(of)最后，尽头atthemercyof在……的支配下atwork在工作atone’sownexpense自费laughat嘲笑throwat向……扔去workhardat努力工作（学习）pointat指着shoutat冲…大声嚷turntotheleftatthetrafficlight,atthestreetcorner,atthecinema,atschool/work,athomeandabroad,ataweddingparty/concert,atJim’s,attheweekend,atdawn/night/mid-day,takeafewdays’holidayatChristmas/Easter,retireattheageof60,beatitsbest,atahighrate,driveatthespeedof,aimtheballatthewindow,stareatthestranger,tearattheletter,beatwarwiththeirneighbors,putsbatrisk/stake,dosthat/onthefirstattempt,atyourservice,attendthereceptionatthechairman’sinvitation,becleveratplayingchess,beamusedatthecartoons,standwithease,By(prep.)byaccident偶然地byair(sea,bus,…)乘飞机（乘船，乘公共汽车……）byletter(e-mail,phone,textmessage)(通过)写信,打电话,发短信,byweight按重量bythehour按小时bychance碰巧，偶然地byday(night)在白天（夜晚）daybyday一天天地byandby不久byfar得多，最最learn(know)byheart记熟，背诵bymistake错误地，由于疏忽所致byoneself独自地onebyone一个一个地bytheway顺便说（问）byturns轮流sidebyside肩并肩，并排，一起bythesideof在……附近declineby2%下降2%ahousebytheriver,comeandsitbyme,walkbymewithoutspeaking;aplaybyFengXiaogang,contactyoubyletter,paybycheck,gobybus,switchitbypressingthebutton,twoo’clockbymywatch,takehimbythehand;dosth.bychance/mistake,finishthejobby5o’clock,bythistimenextweek,travelbyday/night,;misshimbytwoinches,goupby10%,bepaidbythehour,sellitbyweight,aChinesebybirth,adoctorbyprofession,daybyday,bitbybit,twobytwo,littlebylittle,byandby,byfar,mean…by(saying)In(prep.,adv.)inaflash一刹那间inahurry匆忙地，很快地inashortwhile不久，一会而后inthecourseof在……过程中intheday在白天inthedaytime在白天inthefuture将来，以后intheend最后inthemeantime与此同时inthemiddle(of)在……中间intime及时地,最终inaword(inbrief,inshort)总之，简言之inotherwords换句话说in(actual)fact事实上inasense从某种意义上说inall总共，总的来说inanycase不管怎样inbattle在战斗中incase如果，以防（有某种情况）inchains上着镣铐，在囚禁中inchargeof主管，负责incommon共同，共用indanger在危险中indebt负债，欠帐infront前方，正面对infrontof在……前面infull全文地，全部地ingeneral一般地说inmoderntime现代，近代inone’sopinion据（某人的）看法inorderto(that)为了inpeace平静地，安宁地insilence沉默地，无声地inspace在宇宙空间intheair在空中inthewild在野外inpublic在公众面前，公开地inperson亲自inparticular尤其inspiteof尽管inthat因为，原因是inthatcase假如那样的话inthecharge有……掌管inturn轮流payincash用现金支付writeinink用钢笔写believein相信，信任bringin引进，引来，吸收callin召来，召集handin上交，递交handinhand并进，联合，手牵手dropin顺便走访joinin参加，加入onceinawhile偶尔，间或playapartin在……起作用standinline站在队里succeedin（干……）成功takepartin参加in(one’s)searchfor寻找，寻求inreturn作为报答inexchangefor作为对……的交换inreturnfor作为……的报答inadditionto加之，除……之外incontrastto(with)与……形成对比inreplyto作为对……的回报（答复）in(with)referenceto关于inpreparationfor为……作准备inrewardfor作为……的报酬inanswerto回答，响应inoppositi...
