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单词 sine qua non
释义
sine qua nonsine qua non /ˌsɪni kwɑ ˈnɑn/ noun [singular] formal Etymology something that you must have, or which must exist, for something else to be possible: sine qua non for/of Strength of character is the sine qua non of leadership.
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更新时间:2024/9/23 19:24:54