All that remained of a bygone age. 它们是一个过去时代的仅存硕果
most violent eruptions that life has ever witnessed. 最大、最猛烈的喷发之一
in a way that amphibians could not. 在干旱的土地上繁衍
that held the embryo in its own private pool of fluid. 将胚胎保护在“私家泳池”之中
a tie that would be their undoing when conditions on Earth... 当地球上的环境剧变时
that has remained almost the same for hundreds of millions of years. 已经保持了数亿年 几乎不变