were writing a new chapter in the story of life. 正在书写生命故事的新篇章
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
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
Stalking among the glades of palms... 它们在棕榈林地中潜伏
had left many of Earth's great habitats free for the taking. 使地球上许多重要的栖息地 变得唾手可得
But becoming small wouldn't work in every part of the planet. 但变小并不适用于地球的每一个地方