学术界从许多方面来探讨这些重大变化发生的原因和过程。

The academia has been probing the reason and course of these major changes from many aspects.

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新的研究中，关于这些重大变化将造成危险的全球变暖的可能性，Kreigler希望收集专家的观点。

For the new study, Kreigler wanted to glean experts' opinions about the likelihood that these major changes would engender dangerous global warming.

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这些发展导致了重大变化，如地球表面的进一步侵蚀和森林砍伐。

These developments have caused major changes like additional erosion of the Earth's surface and deforestation.

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The trouble is, you just don't know when that explosion took place, and since there are several periods in this general area that we're talking about now, in which something big happened, some great change takes place, it turns out different people want to have their explosion at different times.

问题是,你不了解火山爆发的,确切时间以及这种爆发,在这个区域又延续了很多个时期,这些时期发生了许多重大事件和重大变化,结果就是不同人对,火山爆发的时间推测各不相同

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