of

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Each time, more than three-quarters of all species
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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.
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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.
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and periods of almost endless rain. 以及几乎无休止的降雨期

At times, a realm of ice.
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At times, a realm of ice. 有时是冰的天下

At times, a realm of fire.
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At times, a realm of fire. 有时是火的天下

Eruptions lasting thousands of years
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Eruptions lasting thousands of years 持续数千年的喷发

have repeatedly engulfed vast swathes of our planet.
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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.
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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.
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which leads to the third rule of life. 这产生了生命的第三条法则

He needs a territory of his own.
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He needs a territory of his own. 它需要自己的领地