陈冯富珍说：“下一场大流行将通过[病毒的]适应性突变而发生。

The next pandemic will occur through adaptive mutations [in the virus].

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每增加一例人间病例增强了该病毒通过适应性突变或重组提高其可传播性的机会。

Each additional human case increases opportunities for the virus to improve its transmissibility, through either adaptive mutation or reassortment.

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但是进化还需要反复复制和突变产生赖以选择的变异，从而给予适应性解决方案。

But evolution also requires repeated replication and mutation to generate the variation upon which selection works to give adaptive solutions.

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