they were the very first animals to escape the seafloor and swim. 它们是第一种从海底逃离 并开始游泳的生物
very similar to the first complex life forms. 与最早的复杂生物形态非常相似
and the very first fights for survival... 以及我们这个非凡的星球上
And even the moment when animals first came out of the water. 甚至再到动物第一次离开水的那一刻
...to the ancestors of the birds first taking to the air... 到鸟类的祖先率先上天…
The first rule of life, that the best adapted will win through... 生命的第一条法则适者生存
For the first time in history, there was a global power. 历史上首次出现了一个全球性霸权