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