the few survivors were those who could head to deeper waters. 能够前往更深水域的生物 成为了少数的幸存者
Without this greenhouse gas to warm it, 没有了温室气体保暖
Little by little, the sea started to freeze. 海洋逐渐开始冰冻
...a development that was to have dire consequences. 这将带来可怕的后果
...as the climate suddenly began to cool... 气候突然变冷
will one day give rise to all other vertebrates. 有朝一日 将导致所有其他脊椎动物的崛起
...able to slice through the toughest armor, 能够切割最硬的护甲
All the trilobite can do is try to stay out of reach. 三叶虫能做的只有设法保持距离
Cameroceras have evolved a new way to catch their prey... 房♥角石进化出了捕捉猎物的新方法
are related to this ancient arthropod. 都与这种古代节肢动物有亲属关系