Silurian

常见例句

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。
The third largest extinction in Earth's history, the Ordovician-Silurian mass extinction had two peak dying times separated by hundreds of thousands of years.
作为地球史上消亡物种排行第三的大灭绝，奥陶系-志留纪大灭绝有两个死亡高峰期，其中相隔数十万年时间。
The earliest of the Big Five, the end-Ordovician or Ordovician-Silurian extinction events some 444 million years ago, are reckoned by many to be the second largest.
五次大灭绝中发生最早的一次是奥陶纪末期或者奥陶纪-志留纪大灭绝事件，发生在大约4亿4千4百万年前。许多科学家估计这次规模是五次当中第二大的。