The Age of Reptiles had begun.

爬行动物时代开始了。

This is often called the Age of Reptiles, and with good reason.

这通常被称为爬行动物时代，这是 有充分理由的。

The Age of Reptiles was in full swing, and dinosaurs were more diverse, more fierce, and more strange than ever.

爬行动物时代如火如荼，恐龙比以往任何时候都更多样化、更凶猛、更奇特。

Almost none of the synapsid lineages survived the extinction at the end of the Permian, known as the Great Dying, and their  legacy would soon be overshadowed by the Mesozoic Age of Reptiles.

在二叠纪末期的大灭绝（即所谓的大灭绝）中，几乎没有一个合弓类谱系幸存下来，它们的遗产很快就会被中生代爬行动物时代所掩盖。