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(1)危機(jī)(time of great difficulty or danger)[C，U]：the～in the Middle East中東危機(jī);a～in the nation's domestic affairs這個(gè)國家國內(nèi)事務(wù)的危機(jī);a government/cabinet/political/financial/domestic～政府/內(nèi)閣/政治/財(cái)政/國內(nèi)危機(jī);an economic/emotional～經(jīng)濟(jì)/感情危機(jī);face/create a～面臨/造成危機(jī);in time of～在危難時(shí)刻;a government in～處于危機(jī)中的政府;a～situation危機(jī)狀態(tài);〖同〗emergency;

(2)轉(zhuǎn)折點(diǎn)，緊急關(guān)頭，關(guān)鍵時(shí)刻(decisive，turning point or situation in the course of anything)[C]： a～in one's life一生中的關(guān)鍵時(shí)刻;Things (Affairs) are coming to/drawing to/reaching a～.事情(事態(tài))正臨近緊要關(guān)頭。bring things to a～使事情達(dá)到轉(zhuǎn)折點(diǎn);Negotiations between the two countries are approaching a～.兩國間的談判接近關(guān)鍵時(shí)刻。hold a～talk with sb與……進(jìn)行關(guān)鍵性談判;

(3)(疾病)轉(zhuǎn)折點(diǎn)(turning point in the course of a serious illness，at which there is a sudden change for better or worse)[C]：Although he is still ill，he has passed the～.盡管他的病還沒好，但已過了危險(xiǎn)期。reach/get through the～到達(dá)/通過轉(zhuǎn)折點(diǎn);The fever has passed its～.發(fā)燒的危險(xiǎn)時(shí)刻過去了。The～point was reached and then he got better. 危險(xiǎn)期之后，他的病情就好轉(zhuǎn)了。

→′critical adj;

【辨異】crisis與emergency都指需要采取迅速行動(dòng)和進(jìn)行快速判斷的形勢(盡管這些并不一定能防止有害結(jié)果的發(fā)生)。emergency(緊急情況)指需要立即采取行動(dòng)的形勢，如：A power failure created an emergency in transportation.(斷電造成運(yùn)輸危機(jī)。)crisis是決定一切的關(guān)鍵性轉(zhuǎn)折點(diǎn)，如：Help arrived when affairs had reached a crisis.(正當(dāng)緊急關(guān)頭，救援趕到。)