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.

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。

Combining the two companies' search businesses would come closer to rivalling Google's market share and they would be a serious force in email and instant messaging.

两家公司搜索业务合并在一起，可接近竞争对手谷歌的市场份额，而在电子邮件和即时通讯方面，它们可组成一股强大的力量。