And really what we use the term health span to mean is the amount of time you're alive without disease, or without some age-related functional impairment.

实际上我们使用“健康期”这个词的意思是你没有疾病或没有与年龄相关的功能障碍的时间。

Or you can define disease as a genetic impairment that leads to functional impairment, like, for instance, a duplication of genes on chromosomes.

或者您可以将疾病定义为导致功能障碍的遗传障碍，例如染色体上的基因重复。