Silurian

常見例句

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，隨著生態(tài)系統(tǒng)的復原，其范圍也隨之擴大，其結果是在Silurian期陸生植物變得更為普遍。
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.
作為地球史上消亡物種排行第三的大滅絕，奧陶系-志留紀大滅絕有兩個死亡高峰期，其中相隔數(shù)十萬年時間。
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.
五次大滅絕中發(fā)生最早的一次是奧陶紀末期或者奧陶紀-志留紀大滅絕事件，發(fā)生在大約4億4千4百萬年前。許多科學家估計這次規(guī)模是五次當中第二大的。