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n(1)機緣，偶然，運氣(force that controls the happening of events or way;things happen without any cause or reason that can be seen or understood)[U]：You must leave nothing to～.你決不應(yīng)靠運氣。Let's leave our next meeting to～.咱們下次見面就憑緣分吧。trust to～只憑運氣;C～plays an important part.機緣很關(guān)鍵。Let～decide.聽天由命吧。It was pure～their meeting in London/that they met in London.他們在倫敦遇上純粹是偶然。It was a～meeting/encounter/occurrence/happening.這是偶然遇見/遭遇/事件/事件?！纪絘ccident，fortune，luck;

(2)可能性(possibility;likelihood;that sth will happen)[C，U][N(of)，N+to-inf，N+that]：There's no～of success/a rise/getting a ticket/that.成功/漲工資/弄到票/那沒有可能。What is(are)our～(s)of success/succeeding?(What is(are)the～(s) of our success/succeeding?What～of success/succeeding do we have?)我們成功的可能性如何?He has no～/not much～/only a slim～/a good～of winning.他沒有/不大/很不/很有可能贏。stand very little/a good～of winning幾乎沒有/很有可能贏;There is little (a)～that he'll get well/the situation will improve.他幾乎沒有(有)可能康復(fù)/形勢幾乎沒有(有)可能好轉(zhuǎn)。(The) C～s are that you will win/the train hasn't left yet.很有可能你會贏/火車還沒有開?！纪絧ossibility，likelihood，likeliness;probability;〖反〗impossibility，unlikelihood， improbability;

(3)(好)機會(favourable situation;opportunity)[C][N(of)，N+to-inf]：This is your big～!你的好機會來了!It was his one big～to succeed.這是他成功的大好機會。have (get) a good～of success/escape/going there有一個成功/逃跑/去那兒的好機會;get (have/give sb) a～to explain有(有/給某人)機會解釋;get(have/give sb)no～to talk to sb else沒有(沒有/不給某人)機會與別人交談;ignore/miss a～to do sth忽視/錯過做某事的機會;〖同〗opportunity;

(4)冒險(risk or gamble)[C][N(of)]：take many～s in one's attempt to win the race企圖贏得賽跑要冒很大風險;Don't take～s by driving too fast.不要冒險超速行車。That's a～we'll have to take.我們只好冒一下險了。You might take a～.你可以冒一把險。There's an element of～in this business deal.這樁生意有點風險?！纪絩isk;

by chance 偶然，碰巧：I found it/met him only by～.我只是碰巧找到這個/遇到他的。It was by sheer～that I found out the truth.我發(fā)現(xiàn)事實真相純屬偶然。

by any chance也許，可能：Are you by any～free to come to the theatre tonight? 你今晚上有空去看戲嗎?

v(1)碰巧，偶然，剛好(happen accidentally or unexpectedly)[I+to-inf，I]：I～d to be passing/to overhear them.我剛好路過/碰巧聽見了他們的談話。It (so)～d that I was passing by/he was there. 我碰巧路過/他碰巧在那里?！纪絟appen，occur;

(2)冒險，碰運氣(risk;take a chance with)[T+n，T+-ing]：～another game of cards/another throw of the dice再玩一次牌/賭一次試試;～the possibility of being caught/all one's money (on a horse) at once冒可能被抓住的危險/把所有的錢孤注一擲(押在一匹馬上);I'll have to～it，whatever the outcome may be.我只好不管結(jié)局如何冒一下險了?！玬eeting an enemy patrol冒遇上敵人巡邏隊的危險;〖反〗risk，attempt;

【辨異】1)chance與luck和fortune都有“運氣”的意思。chance是無法預(yù)見和理解的偶然機緣，如：By some strange chance we discovered the error.(由于某種莫名其妙的運氣，我們發(fā)現(xiàn)了那個錯誤。)luck所指的運氣較具體，可能是好運，也可能是壞運，如：I have had bad/good luck all week.(我一個禮拜盡走壞運/好運。)fortune指對人的一生起重要作用的“命運”，或未來的“運氣”，如：What will be our fortune? (我們的命運(運氣)將會如何?) 2)chance與opportunity和occasion皆可指適合做某事的“時機”。chance與opportunity都可表示“機會”，用法也相近，可互換，指做某事所需的客觀條件已具備的時刻，如：I had the chance/opportunity to visit/of visiting Paris.(我有機會參觀巴黎。)但注意，下句中的chance不可用opportunity代替：There is a chance that you'll see him.因為句中的chance當“可能性”講(見(2))，opportunity無這種語義，也無這種用法。occasion(時機，機會)指有可能做某事的特定時刻，如：If the occasion arrives，I'll speak to him.(如果有機會我要和他談話。)此字也無“可能性”的意思。3)chance與happen和occur都可表示“發(fā)生”。chance指“意外”、“偶然”發(fā)生，語體色彩較為正式，如：It chanced to rain that day.(那天碰巧下雨。)happen可指一般的發(fā)生，也可指“意外”、“偶然”發(fā)生，是最通常用詞，如：It happened yesterday.(這事發(fā)生在昨天。)I happened to be there.(我碰巧在那里。)occur的語體色彩較happen正式，時間和事情本身更具體，如：His death occurred the following year.(第二年他死了。) 還有短語take place，指計劃中的事情發(fā)生，如：The funeral took place the following day.(第二天舉行了葬禮。)