Each time, more than three-quarters of all species 每一次 超过四分之三的物种
the planet has pushed life to the very edge of existence. 地球将生命推到了灭绝边缘
and periods of almost endless rain. 以及几乎无休止的降雨期
Eruptions lasting thousands of years 持续数千年的喷发
have repeatedly engulfed vast swathes of our planet. 反复地吞没地球上的广阔区域
Throughout history, volcanoes have been one of the greatest agents of change. 纵观历史 火山一直是最大的变化因素之一
which leads to the third rule of life. 这产生了生命的第三条法则