Earlier, the Babylonians had attempted to map the world, but they presented it in the form of a flattened disc rather than a sphere, which was the form adopted by Ptolemy.
在这以前更早的时候，巴比伦人曾经企图绘制世界地图，但是巴比伦人绘制成一个扁平的圆盘形，而不是绘制像托勒密所绘制的球形。
A sphere cannot be represented on a flat plane without distortion, which means all map projections distort in one way or another.
球体在平面上不进行扭曲就无法表现出来，这意味着所有制图方式都会以某种方式出现扭曲。
He drew a world map on a sphere.
他在球上面画一幅世界地图。
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