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But before this process had been in place for a while, there wasn't enough oxygen in the air for things to burn.
但是，在此转化之前的一段时间，空气中没有足够的氧气可以燃烧东西。
In fact, of all the planets, moons, asteroids, and comets in our solar system,
而事实上，整个太阳系的所有的行星、月球、小行星、彗星，
the only place where you can actually start a fire is right here on earth.
你会发现唯一可以生活的地方只有地球。
And even here, it's only been possible relatively recently.
而就算是地球，也是不久以前才可行。
译文为可可英语翻译，未经授权请勿转载!
