也许会大幅减少
It may be drastically reduced
以上为机器翻译结果，长、整句建议使用 人工翻译 。
人口数量大幅减少，也许90%的物种会灭绝，情况堪与地球45亿年历史中最严重的大规模灭绝匹敌。
Human population is drastically reduced. Perhaps 90% of species become extinct, rivalling the worst mass extinctions in the Earth's 4.5 billion-year history.
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