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It was this reaction that stopped the oxygen leaving the sea.
这反应就阻止了氧气离开大海
The rust fell to the bottom of the sea and it built up as layers.
铁锈沉入海底，层层堆积
And you can...Oh!
你可以…噢！
This is so hot. You can see these layers right here.
这太热了你能看到铁锈层就在那
I mean, this is metal, that's why it's so hot.
我是说，这是金属，所以非常热
You can see the layers in the fine colourful banding on this rock.
你可以看到这铁锈层有很漂亮的条纹
Here it's on a tiny scale, but on this cliff, it's on a massive scale.
这是一条细小的条纹在这悬崖上，有非常大的条纹
The layers of rust were laid down all across the world,
铁锈层在整个世界都有
eventually turning into seams of iron ore.
甚至变成铁矿石缝
All this iron ore, in fact, much of the iron ore mined across the world,
这些铁矿石实际上世界大部分铁矿石脉
only exists because very early life, stromatolites,
存在是因为早期生命，叠层石
started filling the seas with oxygen more than two billion years ago.
二十亿年前开始为海水输氧气
But that was just the very beginning of how oxygen changed our planet.
不过这是氧气改变我们星球最初始的情况
