An area half the size of the United States 一个面♥积♥相当于半个美国的区域
because in the far north of Pangaea, 因为在盘♥古♥大♥陆♥遥远的北方
has been a feature of life on Earth for hundreds of millions of years. 数亿年来 一直是地球生命的特点
These sleeping armored beasts are a primitive type of reptile. 这些沉睡着的身穿护甲的野兽 是一种原始的爬行动物
and the start of an endless rivalry. 无尽的竞争也由此开始
Sixty million years after the evolution of the amniotic egg, 进化出蛋之后6000万年
was finally broken by the evolution of this amniotic egg. 与水的联♥系♥终于被断开