The main suspects behind these catastrophes seem to come either from above, in the form of deadly asteroids or comets, or from below, in the form of extraordinarily massive volcanism.
科学家们猜测这些巨大灾难的原因要么是来自天上致命的小行星或彗星；要么是来自地上超大规模的火山喷发。
The main suspects behind these catastrophes seem to come either from above, in the form of deadly asteroids or comets, or from below, in the form of extraordinarily massive volcanism.
科学家们猜测这些巨大灾难的原因要么是来自天上致命的小行星或彗星；要么是来自地上超大规模的火山喷发。
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