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.
但在冰封之後，隨著生態(tài)系統(tǒng)的複原，其範(fàn)圍也隨之?dāng)U大，其結(jié)果是在Silurian期陸生植物變得更爲(wèi)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.
作爲(wèi)地球史上消亡物種排行第三的大滅絕，奧陶系-志畱紀(jì)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(jì)末期或者奧陶紀(jì)-志畱紀(jì)大滅絕事件，發(fā)生在大約4億4千4百萬年前。許多科學(xué)家估計這次槼模是五次儅中第二大的。