The earth together with its circumjacent waters must in fact have such a shape as its shadow reveals, for it eclipses the moon with the arc of a perfect circle.
地球及其周围的水域实际上必须具有其阴影所揭示的形状,因为它以完美的圆弧遮蔽了月亮。
当数据与经验结合时,才能做出最佳决策。