sexagesimally
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The day was subdivided sexagesimally, that is by 160, by 160 of that, by 160 of that, etc, to at least six places after the sexagesimal point (a precision of less than 2 microseconds) by the Babylonians after 300 BC, but they did not sexagesimally subdivide smaller units of time.
六十进位制来自巴比伦,她们以六十这个因素做为计算数量的单位。但是巴比伦人并没有将时分割为60分,而是古埃及将一日分为12时的白天和12时的夜晚,她们也这样子来区分四季。
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As another example, they specified that the mean synodic month was 29;31,50,8,20 days (four fractional sexagesimal positions), which was repeated by Hipparchus and Ptolemy sexagesimally, and is currently the mean synodic month of the Hebrew calendar, though restated as 29 days 12 hours 793 halakim (where 1 hour = 1080 halakim).
此处虽然如此表示,但很难相信古希腊人需要定义秒古希腊的时间周期,像是平朔望月定义得非常精确,因为他们不是观察单一的朔望月,而是以相距数百年的食来测量朔望月的平均长度。不过,发展出摆钟来保持平时(相对於日晷所显示的视时),使得秒成为可测量的时间单位。