By taking a few steps to get from a rounded sphere to a flat map, Narukawa managed to maintain the correct area ratios of land and water.
明川用了几个步骤把一个圆球变成了一幅平面地图，并设法维持正确的水陆面积比。
By taking a few steps to get from a rounded sphere to a flat map, Narukawa managed to maintain the correct area ratios of land and water.
明川用了几个步骤把一个圆球变成了一幅平面地图，并设法维持正确的水陆面积比。
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