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为什么冬天白天短黑夜长
更新时间: 2020-11-04 00:00:00  

冬天白天短黑夜长是因为地轴是倾斜的,地球自转造成了北半球冬天夜晚比白天长。地球自转和公转造成的自然现象。地球的自转轴与公转轨道,有一个60多度的夹角,夏天,太阳照在北回归线上,北半球光照时间长,白天就长,黑夜也就相对短了;冬天,太阳照在南回归线上,南半球白天长,黑夜短。

关键词: 为什么 冬天 白天 黑夜

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