1.Volcanic explosions could bring the whole animal species to extinction.

火山爆發(fā)可能會使所有的動物滅絕。

2.They occur primarily in regions of recent volcanic activity as hot, dry rock; natural hot water; or natural steam.

地熱能主要以干熱的巖石、自然熱水或自然蒸汽的形式出現(xiàn)在近期火山活動的區(qū)域。

3.Gas mixtures emitted from present-day volcanoes resemble this early atmosphere, suggesting its origin from volcanic eruptions.

現(xiàn)代火山釋放出的氣體混合物類似于這種早期的大氣，這表明它（地球）起源于火山噴發(fā)。

4.Volcanic activity has created thermal springs and boiling mud pools.

火山活動產(chǎn)生了溫泉和沸騰的泥漿池。

5.Water and heat from volcanic activity are two basic conditions needed for life to form.

火山活動所散發(fā)的熱量和水是形成生命的兩個基本條件。

6.Although the origins are uncertain, experts think that this is largely due to the high level of volcanic activity in the area.

盡管起源還不確定，專家認為這主要是由該地區(qū)頻繁的火山噴發(fā)所造成的。