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数学故事时分秒的来历
更新时间: 2020-10-11 00:00:00  

古埃及人表示一昼夜的变化是把白天定为10小时,夜晚定为12小时。由于四季的变化,白天和黑夜的长短不一样,后来把一昼夜变化均匀地分为24小时,每小时为60分,每分为60秒。这种计时方法一直沿用到今天,成为全世界公用的时间计量单位。

关键词: 数学 故事 分秒 来历

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