Evolution of new species typically takes at least hundreds of thousands of years, and recovery from mass extinction episodes probably occurs on timescales encompassing millions of years.
新物种的进化通常要花费最少几十万年，而且恢复大规模物种灭绝中的一小段也可能需要几百万年。
Their new model reproduces 13 billion years? Worth of cosmic evolution, resulting in a surprisingly accurate tally of the different kinds of galaxies we see.
他们的新模型再现了130亿年的宇宙演化史，得到的结果与我们今天所看到的各种不同星系惊人的吻合。
Their new model reproduces 13 billion years' worth of cosmic evolution, resulting in a surprisingly accurate tally of the different kinds of galaxies we see.
他们的新模型再现了130亿年的宇宙演化史，得到的结果与我们今天所看到的各种不同星系惊人的吻合。
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