Why? Lunar regolith, like regolith on earth has water and oxygen in it.

为什么？月球风化层与地球风化层一样，含有水和氧气。

The moon's surface is covered in a layer of something called lunar regolith.

月球表面覆盖着一层称为月球风化层的东西。

Like the product of this gravel mill, lunar regolith has formed in a variety of grain sizes, from large rocks to fine dust.

就像这个研磨机的产物，月球风化层以各种各样的颗粒组成，从大石块到细沙。

If humans construct a colony near the Moon, we could cheaply build structures out of  lunar regolith.

如果人类在月球附近建造一个殖民地，我们就可以用月球风化层廉价地建造建筑物。

Lunar regolith, like regolith on earth has water and oxygen in it but being able to mine those elements on the moon could help support a potential base there.

月球的风化层，就像地球上的风化层一样，里面含有水和氧气，但是能够在月球上开采这些元素有助于在那里建立一个潜在的基地。