New research is providing a deeper understanding of Whatcheeria, which lived around 330 million years ago during a time known as the Carboniferous period.

新的研究让人们对瓦切螈有了更深入的了解，它生活在大约3。3亿年前被称为石炭纪的时期。

Oxygen levels in the Devonian and Carboniferous periods, when terrestrial life first bloomed, were as high as 35 percent (as opposed to nearer 20 percent now).

在陆地生命大幅度增加的泥盆纪和石炭纪，空气中的氧的浓度高达35%（现在是将近20%）。

It lived in the Inland Seas of North America 300 million years ago at the very end of the carboniferous period.

生活在3亿年前石炭纪末期的北美洲内海。

The whole history of the carboniferous period was written upon these gloomy walls, and a geologist might with ease trace all its diverse phases.

石炭纪的整个历史都写在这些阴暗的墙壁上，地质学家可以轻松地追踪其所有不同的阶段。