下表为地球在公转轨道不同位置时公转速度的变化资料据此比较北极和南极极夜持续天数 a北极极夜的持续天数多于南极 b北极极夜的持续天数与 Template




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tomski下表为地球在公转轨道不同位置时公转速度的变化资料据此比较北极和南极极夜持续天数 a北极极夜的持续天数多于南极 b北极极夜的持续天数与 coloring