The origin, conception and function of digital earth is narrated.
2
当然这样一个过程得用上成千上万年。 在如今，似乎没有很好的方法和理由来使火星地球化。
Of course this in itself would take millions of years, at the present there seems no way to terraform Mars and no reason to.
3
由此断定月球的轨道主要由来自太阳的牵引力决定，所以地球对于太阳的轨道一直是椭圆形的。
It follows that the Moon's orbit is primarily determined by the gravitation pull from the Sun, so the orbit of the Earth will always curve towards the Sun.
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