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n (1)一(半)(one of two equal parts of anything which together form the whole thing)[C]：cut/break a cake in～/into halves 把蛋糕切/掰成兩半;the second/bigger/other～第二部分/較大的那一半/另一半;join/stick two～ves together把兩部分接合/黏在一起;a kilo/a mile and a～1.5公斤/英里;three and a～ounces/hours/miles 3.5盎司/小時(shí)/英里;〖反〗whole;

(2)(比賽的)半場(chǎng)(one of the two playing periods into which certain games are divided)[C]：score three goals in the first～上半場(chǎng)得了三分;

(3)半價(jià)票(ticket that is half the value or cost of an ordinary ticket，eg on a bus or train for a child below a certain age)[C]：Three and two～ves to the city council hall，please.請(qǐng)給我去市政廳的三張整票，兩張半票。

(4)半品脫(half a pint of)[C](infml，尤BrE)：Three～ves of lager/bitter beer，please.請(qǐng)來(lái)三份半品脫淡/苦啤酒。

and a half 非常好(大，重要)(infml)：a meal/a game and a～一頓豐盛的飯/一場(chǎng)精彩的比賽;

by halves 半途而廢的，不徹底的：not do anything by～ves 做事情不要半途而廢;

go half and half/go halves (with sb)平攤(費(fèi)用)：go～ves with sb in buying the wine/paying for the drinks 與某人分?jǐn)傎I葡萄酒/酒的錢;

det 一半(being half in amount，degree，length，etc)：～an hour/a pint/a mile 半小時(shí)/品脫/英里;buy～a dozen apples 買半打蘋果;eat～a pound of meat 吃半磅肉;～the fruit/the night/the story 半個(gè)水果/夜晚/故事;have a～share 有一半的股份;stand in a～circle 站成半個(gè)圓圈;give a sort of～smile 露出似笑非笑的樣子;～a minute/a second/a tick 一會(huì)兒，很短的時(shí)間(infml)?～past/(AmE) after one (時(shí)間)1點(diǎn)半;〖反〗whole;

half one，two，etc (BrE，infml) (時(shí)間)1點(diǎn)半(兩點(diǎn)半……)：go out at～nine 9點(diǎn)半出去;

half the battle最艱難的一部分：When you write an essay for class，making the outline is～the battle. 寫學(xué)業(yè)論文時(shí)，列提綱是最難的部分。

pron 一半，半數(shù)(either of the 2 parts or group)：～of ten/the apple/one's money 10/蘋果/某人的錢的一半;need～需要一半;Out of 30 students，～passed. 30個(gè)學(xué)生中，一半通過(guò)了。

→?half-and′half adj 對(duì)半混合(摻)的;′half-back n(足球，曲棍球)中衛(wèi);′half-brother n 異父(母)兄弟;′half-caste，′half-breed n 混血兒;?half-′crown n 兩個(gè)半先令;?half-′hourly adj 每隔半小時(shí)的;?half-′length adj 半身的;′half-life n 半衰期;′half-light n 暗淡的光線;?half-′mast n(表示哀悼)下半旗;′half-note n 二分音符;′halfpenny n 半便士硬幣;(1971年后)半便士新幣;halfpenny worth n 半便士能買到的東西;很小的數(shù)量;?half-′price adv 半價(jià)地;′half-sister n 異父(母)姐妹;?half-′size adj 平常號(hào)碼的一半;?half-′term n 期中假;?half-′time n 中場(chǎng)休息時(shí)間;′half-tone n 照相銅板;′half-track n 半履帶式車輛;′half-truth n 只有部分真實(shí)性的陳述或報(bào)道;?half-′way adj & adv半途的(地)，不徹底的(地)′half-wit n 笨蛋，蠢人;?half-′witted adj 愚蠢的，智力上有缺陷的;half-′yearly adj & adv 每隔半年的(地);

adv (1)一半地(to the extent of one half)：The cup is～full. 杯子半滿。The theatre was～empty. 劇院半空。The house is～hidden by the trees. 房子一半被樹遮住了。a～empty tank 半空的容器;

(2)部分地(not completely;in part)：be～cooked 做得半生不熟;～regret/hope that... 有點(diǎn)后悔/希望……;He's～recovered. 他已經(jīng)有些恢復(fù)了。

half as many/much，etc again加半倍：need～as many again需要再增加半倍;～as big again加大一半;

not half 1)一點(diǎn)也不(infml)：The flat/The food is not～bad.這房子/食物很不錯(cuò)。2)非常，在很大程度上(sl)：be not～good/windy/annoyed/stupid很好/風(fēng)很大/很生氣/非常愚蠢;do not～swear/complain 大罵特罵/喋喋不休地抱怨;

not half as不比……更：feel not～as cold/bad覺得不冷/好多了;

→?half-′baked adj 笨(愚蠢)的;?half-′hardy adj(植物等)尚能禁得起一般寒冷的;?half-′hearted adj 缺乏熱情的;?half-′heartedly adv無(wú)精打采地;?half-′timbered adj(指房屋)木架結(jié)構(gòu)的;

【用法】 1)half(半)、quarter(四分之一)和 whole(整個(gè))都可用作名詞，如：Two halves make a whole. 兩個(gè)一半組成一個(gè)整體。Cut a pear into quarters.把一個(gè)梨切成四份。whole還可作形容詞，例如：a whole hour整整一小時(shí);half亦可作限定詞，如：half the time/a mile一半時(shí)間/半英里;half還可作副詞，如：The theater was half empty.劇場(chǎng)空了一半。 2)當(dāng)1?說(shuō)成是one and a half(一個(gè)半)時(shí)，其后名詞用復(fù)數(shù)形式，例如：One and a half months(一個(gè)半月);當(dāng)說(shuō)成是 a...and a half(一個(gè)半)時(shí)，則其后名詞用單數(shù)形式，例如：a month and a half(一個(gè)半月); 3)在 AmE 中，一些人認(rèn)為a half mile 的說(shuō)法比 half a mile 規(guī)范。