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入伏和初伏如何计算
更新时间: 2020-11-06 00:00:00  

入伏和初伏计算,可以用夏至三庚这4字口诀来表示入伏的日期,即从夏至后第3个庚日算起,初伏为10天,中伏为10天或20天,末伏为10天,我国古代流行干支纪日法,用10个天干与12个地支相配而成的60组不同的名称来记日子,循环使用,入伏后,地表湿度变大,每天吸收的热量多,散发的热量少,地表层的热量累积下来,所以一天比一天热。

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