Now, in any society changing this much, this fast, doubling its own population--doubling--in twenty-five years.

现在,在任何变化如此巨大的社会,如此迅速地,在二十五年内,人口增至两倍

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So more than doubling the risk can certainly site to the population Now these kind of results show how important it is to do studies that don't group everybody in the population together.

由图可见,发病率差异量超过一倍,这些研究结果表明,在研究过程中分组的重要性

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