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At the dawn of time.
创始之初
the universe explodes into being.
大爆炸形成了宇宙
With it, every atom in our bodies.
随之而来形成了我们体内的每一个原子
Countless galaxies, innumerable stars.
以及无数的银河系与恒星
And around one of them, a blue planet,
在其中一颗恒星的周围 有一颗蓝色的星球
Our earth.
这就是我们的地球
No other known planet has both an atmosphere and liquid water.
已知行星中没有哪一颗既有大气层又有液态水
The conditions needed for life.
这是有生命存在的两个条件
13 billion years after the universe begins,
宇宙出现130亿年后
A unique species is born.
一个独一无二的物种诞生了
Mankind.
人类
Now, in the grasslands of East Africa,
在东非的草原上
We begin our struggle against the odds.
我们开始与不利情况作斗争
A band of brothers.
一群兄弟们
Their leader, the genetic ancestor of all mankind.
他们的领袖是所有人类的祖先
