The most dangerous animal the world had ever seen. 这是世界上出现过的最危险的动物
He's never seen a Doedicurus up close, 它从未如此近距离见过巨犰狳
can best be seen in a world lost in time. 可以在一个迷失在时间中的世界 得以最好的展现
they formed the largest living structure our planet has ever seen... 形成地球史上最大的生物结构
form some of the largest herds the Earth had ever seen. 形成了地球史上最大的兽群
gradually forming the largest and most hostile desert the planet has ever seen. 逐渐形成 地球史上最大、环境最恶劣的沙漠
And one group adapted in a way never seen before. 有一群生物以前所未见的方式 适应了这种转变
I have seen desert expanses baking in the sun. 我见过太阳下炙热的沙漠
I have seen wind farms off the coast of Denmark... 我在丹麦海岸见过风力发电站