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lifespan 音标拼音: [l'ɑɪfsp,æn] 存在时间; 平均生命期; 寿命 存在时间; 平均生命期; 寿命 lifespan
n 1: the period during which something is functional (as between birth and death); "the battery had a short life"; "he lived a long and happy life" [synonym: {life}, {lifetime}, {life- time}, {lifespan}]
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