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once

英[wʌns]美[wʌns]

ad.
1.仅仅一次；（作为）一次
2.一度；曾经
3.从前；过去；往日
4.根本；即使一次
conj.
1.一旦；一…就…
n.[sing]
1.[the once]【口】这一次；一次

同：	[r.] erst, erstwhile, in one case, one time

The upshot of Miss Ley's investigation was that once again the hymeneal path had not been found strewn with roses
莱伊小姐调查研究的结果是又一次发现这条婚姻的道路上并没有铺上玫瑰花。收藏
Once a satisfactory system of lubrication has been secured the hardness of the interacting elements becomes critical.
一旦获得了满意的润滑系统，相互作用的元件的硬度就成为紧要之事。收藏
Once he piloted my wife Nancy and me in his helicopter on a hair-raising ride at treetop level.
有一次，他驾直升飞机让我妻子南希和我作了一次只有树梢那样高的飞行，这真叫人提心吊胆。收藏
The visitors were able to cross the midfield stripe once during the whole game.
客队在整个比赛中只有一次攻过50码线。收藏
He had only to speak one word and his dog would come to hell at once.
他一招呼，他的狗就会应声跟来。收藏

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