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四旬是多大
更新时间： 2021-12-10 10:39:18  

十岁为一旬，比如，四旬是40岁，八旬即80岁。在诗、联中常用。随着全球人口平均寿命的延长和老龄化的加剧，WHO对年龄分期进行了重新划定，规定44岁以内为青年人，45～59岁为中年人（壮年期），60～74岁为年轻老人，75～89岁为真正老人，90岁以上为长寿老人，100岁以上为百岁老人。

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