- it became a harsher, more difficult place to live.
它成为了 一个更恶劣、更难以生存的地方 - Food became more spread out,
食物变得更分散 - harder to find.
更难以寻找 - And as the Earth changed,
随着地球的改变 - so did the mammals.
哺乳动物也在改变 - Some became enormous.
有一些变得很庞大 - A male Megacerops.
一只雄性巨角犀