The price of bringing something to Mars that could terraform it would cost billions, possibly even trillions.
将火星地球化的材料带到火星就得花费上数十亿，甚至几万亿的钞票了。
2
Of course this in itself would take millions of years, at the present there seems no way to terraform Mars and no reason to.
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。
3
Mars. Kim Stanley Robinson. In the year 2026, a group of 100 explorers sets out to colonize and terraform Mars. Except, not everyone wants it that way.