adj (1) 双(加)倍的(having twice the (usual)size， weight， strength， number， amount， etc) [通常作attrib]：a～whisky/gin 一杯双料威士忌/杜松子酒;a～helping of peas/portion of potatoes 双份的豌豆/土豆;a～dose 双倍剂量;～pay/work/strength 双倍的报酬/工作/强度;～width/cream 双幅/高脂肪奶油;a～thickness of paper 纸的两倍厚;
 (2) 成双的，双层(排)的(consisting of two parts or things that are alike) [通常作attrib]：a～track/lock/window 双轨/双重锁/双层窗户;a gun with a～barrel 双筒枪;a man with a～chin 双层下巴的人; a ship with a～bottom 双层底的船;a～negative 双重否定;a～pay advertisement/bill 双版广告/连映(演);～doors/windows 双扇门/窗;～yellow lines/figures 双黄线/两位数;～inverted commas 双引号(“”);work in～harness(夫妻、兄弟、同伴)两人一起工作;～-decker 双层公共汽车;〖同〗paired， twin;
 (3) 供两者用的，双人的(made or designed for two people and things) [通常作attrib]：a～room/bed/ticket(to a dance)/sheet/blanket/writing table 双人房间/床/(舞)票/床单/毯子/写字台;a～garage/wedding/date 放两辆车的车库/两对配偶的婚礼/两对男女的分别约会;
 (4) 双重的(of two different kinds， possibilities， qualities， etc together) [通常作attrib]：a～meaning/entendre 双关语义/双关语; a～purpose/aim/interpretation/agent 双重目的/目标/解释/间谍;a man with a～character/standard 双重性格/双重(道德)标准的人;the～advantage of being easy and cheap 既简单又便宜的双重优点; lead a～life 过双重人格的生活;do～duty 尽双重职责;〖同〗two-sided;
 (5)(花)重瓣的((of flowers) having more than the usual number of petals)[通常作attrib]：a～rose/chrysanthemum 重瓣的玫瑰花/菊花;
 →͵double-′bedded adj 有双人床的;͵double-′dealer n 口是心非的人;͵double-′dealing n 口是心非;′double-talk n 反话;′doubly adv 双倍地;双重地;
 det 双(加)倍的(twice the(usual)size， weight， strength， number， amount， etc)：～the usual quantity 通常数量的两倍;The job took～the time expected. 这个活儿花了预计的两倍时间。We need～the amount of milk/coal that you have. 我们需要你们现有的两倍那么多牛奶/煤。My income is～hers/what it was. 我的收入是她的收入/我过去的收入的两倍。He earns～what she does. 他赚的钱是她的两倍。The figure is more than～that of 1990/the 1990 figure. 这个数字比1990年的两倍还多。
 adv 成双(对)地(in twos， in pairs or in groups of two)：see/sleep～看成双影/俩人睡在一张床上; ride～on a horse 两人骑一匹马;fold a blanket/sheet～把毯子/床单对折;He was bent～with age.他上了岁数，背都驼了。
 →͵double-′barrelled adj 双筒的;复姓的;͵double-′breasted adj 对襟的;͵double-′edged adj 双刃的;双关的;͵double-′dyed adj 坏透了的;͵double-′faced adj 两面派的;͵double-′jointed adj 关节能前后弯曲的;͵double-′quick adj & adv 很快的(地);͵double-′book v ͵double-′booking n 将……同时预订给两个以上的人;͵double-′check v & n 两次(仔细)检查;͵double-′cross v & n (得到信任后)出卖;͵double-′park v 并列停车(于路边);
 n(1) 两(双)倍(twice the (usual) size， weight， strength， number， amount，etc) [U]：Four is the～of two. 4是2的两倍。pay/offer sb～for sth 付给/提出要付给某人两倍于……的钱;He got/won ￡10 but I got/won～. 他得到/赢得10英镑，而我得到/赢得了他的两倍那么多。
 (2) 1) 一模一样的人或物(person or thing that resembles another) [C]：She is her mother's～(the～of her mother)(at the same age). 她长得和她母亲(当年同样年龄时)一模一样。This dress is the～of that.这件衣服和那件一样。Here is the～of your lost glove. 这只手套和你丢的那只非常相像。〖同〗 twin;2)(电影)替身演员(person who acts instead of a star in a film in some special， esp dangerous， scenes) [C];
 (3) 双倍量的一杯酒(glass of spirits that is twice the standard usu sold as one drink) [C]：I want a～(Scotch)， please. 我要一杯双份(苏格兰)威士忌酒。Two Scotches and make them～s. 两杯苏格兰威士忌酒，每杯都加倍量。
 (4) 双打(match(esp of tennis) in which one pair plays another)[C， 常pl]：play～s 打双打;the men's/women's～s 男子/女子双打;mixed ～s 男女混合双打;a～s match 双打比赛;
 at/(AmE) on the double 快(跑)步走：He came/marched at the～. 他两步并作一步地走来/迈进。
 v(1)(使)加倍((cause sth to) become twice as great or as numerous) [I， T+n]：Sales/Prices/Costs/The number (of accidents)/The population/His money～d over in the past five years.销售额/价格/成本/(事故)数/人口/他的钱在过去的五年内翻了一番。～the amount/the quantity/sb's salary/one's income 使总量/数量/某人的薪水/自己的收入增加一倍;The baby～d its weight in a year. 婴儿的体重在一年内增加了一倍。The company～d its profits in a year.公司的利润在一年内增加了一倍。The country～d its output in a year. 国家生产在一年内增加了一倍。Ten～s five. 10是5的两倍。
 (2) 对折，折叠(cause to bend or fold in two) [T+n，T+n+adv(up/over/across/back)]：～a blanket/a cover/a sheet (over)把毯子/被子/床单折叠起来;He～d his slice of bread to make a sandwich. 他把面包片折起来做成一个三明治。～one's arms across one's chest 将双臂抱在胸前;
 (3) 兼作(它用)(serve an additional purpose)[I+prep(as)]：The sofa～s as a bed. 这沙发同时兼作床。The bed～s as a couch. 这床同时兼作长沙发。The history teacher～d as a hockey coach. 历史教师兼任曲棍球教练。The girl～s as secretary and receptionist/coach and captain. 这姑娘同时兼任秘书和接待员/教练和队长。
 (4) 兼演(两个角色)((of an actor or actress)play (a second part) as well as another) [I+prep(as)，T+n]：Her main part is the mother， but she～s as the daughter. 她的主要角色是母亲，但她还兼演女儿。She～s as the mother and the daughter.(She～s the (two) parts of the mother and the daughter.) 她兼演母亲和女儿两个角色。
 (5) 同奏(唱)((music) play or sing the same music as (another instrument or voice))[T+n]：The violins～d the sopranos. 小提琴为女高音手伴奏。The saxophonist～d on drums. 吹萨克斯管的人与鼓合奏。
 double back(v adv)折回(vi)：The bridge ahead was blown， so they had to～back. 前面的桥被炸毁了，所以他们只好往回走。
 double up/over (v adv)(使)弯下腰来(vt & vi)：He('s)～d up (over) with pain/laughter/anger/mirth. 他疼/笑/气/高兴得直不起腰来了。The pain/blow～d him up. 疼痛/那一击使他直不起腰来。
 double up (on sth/with sb)(v adv prep)与……一起……(vi)：She had to～up with her sister. 她只好和妹妹睡在一间屋了。