silurian period

基本解释

In the Ordovician, Silurian Period, the Devonian, Carboniferous, the advent of low amphibians and ancient ancient reptiles.
在奥陶纪、志留纪、泥盆纪、石炭纪，相继出现低等鱼类、古两栖类和古爬行类动物。
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The first fossil records of vascular plants—that is, land plants with tissue that carries food—appeared in the Silurian period.
最早的导管植物（即带有运载食物组织的陆地植物）的化石记录出现在志留纪时代。
But as the ecosystem recovered after the freeze, it expanded, with land plants becoming common over the course of the Silurian period.
但在冰封之后，随着生态系统的复原，其范围也随之扩大，其结果是在Silurian期陆生植物变得更为普遍。