The savage terror birds now dominated the plains of South America. 野蛮的骇鸟统治着南美洲的平原
Using the weight of his giant head, 它利用自己巨大头部的重量
But the terror bird moves in near silence. 但是骇鸟的行动悄无声息
about the size of a modern-day llama. 大小与现代美洲驼相仿
In the clearing, a herd of early mammals graze. 空地上 一群早期哺乳动物在吃草
to evolve into the deadliest predator since Tyrannosaurus rex. 进化成了 自霸王龙以来最致命的捕食者
Stalking among the glades of palms... 它们在棕榈林地中潜伏