the continents had shifted almost to where they are today. 各大♥陆♥几乎漂移到了今天所在的位置
every land habitat the changing planet had to offer. 主宰每一片陆地栖息地
form some of the largest herds the Earth had ever seen. 形成了地球史上最大的兽群
...but they had evolved jaws that could chew. 但它们已经进化出能够咀嚼的颌部
Spiders had been around for over 100 million years... 当时蜘蛛已经存在超过一亿年
...reptiles have had to adapt to an ever more crowded world. 爬行动物 不得不适应一个越来越拥挤的世界
have had little competition or predators, 几乎没有竞争对手和捕食者
the Earth's continents had been converging, 地球的大♥陆♥一直在汇聚
Never had their survival been so important. 其生存从未如此重要