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夏从一个时间物候之词,一步步假借并丰富其含义,以至于成为国家、文化的名称当太阳到达黄经45℃时,是为太阳回归年的5月5日或6日,北半球的春天算是过去了。“斗指东南,维为立夏,万物至此皆长大,故名立夏也。”“立,建始也,夏,假也,物至此时皆假大也。”在天文学上,立夏表示告别春天,进入到夏天了。天文时间、地球生物时间、人文时间并非严格一致,它们之间有一种“罗致协从”的关系,即天文时间,日地
Xia from a time word of fortune, step by step and enrich its meaning, so that the name of the country, when the sun reaches the Yellow Skeleton by 45 ℃, is the return of the sun on May 5 or 6, the spring of the northern hemisphere It is passed. “Fight means the southeast, the dimension is the beginning of the summer, all things are grown up, hence the name of the establishment of the summer. ” “Stand, also beginning, summer, fake too, things are fake at this time also large. ” In astronomy, Say goodbye to spring, into the summer. Astronomical time, biological life time, humanistic time is not strictly consistent, there is a kind of relationship between them, that is, astronomical time, day