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时针走一圈分针要走多少圈
更新时间: 2020-10-23 00:00:00  

时针走一格是一小时,分针就要走一圈,所以,时针走一圈是13小时,分针就要走12圈。

时针之所以“顺时针”转动,是源自其前身日晷。时针首先出现于北半球,其作用与日晷投射在地上的“影子指针”相似。

太阳由东边升起西边落下,它投射在日晷上的影子之运行方向相反,是由西向东,所以日晷上代表时间的数字排列也是如此,现代时钟表面数字沿用了这种排列方式。

关键词: 时针 多少

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