Mapping the Moon is a challenge because its color does not change greatly.

测绘月球称为一项挑战，原因在于它的颜色不会大幅变化。

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The cameras are among seven instruments that are mapping the surface of the Moon from the Lunar Reconnaissance Orbiter, which orbits 50 kilometers above the Moon.

这些相机，是七个从距月球50公里处的探测卫星处绘制月球表面图像的仪器之一。

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Global mapping has shown that these ancient mare flows are very widespread across the far side of the moon and the limb regions (the border between the near and far sides).

全球性的测量指出，这些古老的月海岩流在月球的远地面和边缘地区(近地面和远地面交界处)分布广泛。

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Global mapping has shown that these ancient mare flows are very widespread across the far side of the moon and the limb regions (the border between the near and far sides).

全球性的测量指出，这些古老的月海岩流在月球的远地面和边缘地区(近地面和远地面交界处)分布广泛。

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