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春夏之交的时间
更新时间: 2020-10-26 00:00:00  

6月22日为夏至日。那天太阳直射北回归线,此时北回归线及其以北各纬度,正午太阳高度达到一年中的最大值。各纬度的昼长达到一年中的最大值,北极圈以北地区,太阳整日不落,出现极昼现象。我国习惯把立夏作为春季的结束,夏季的开始,即春夏之交。

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