But we’ve also lost some of our natural, microbial diversity.

部分微生物赋予他们特别的优势 例如有一种细菌可以抑制肾结石生长。

Yet, from the microbial diversity we find here and in other ecosystems, we can deduce the characteristics of the first living organisms.

然而，从我们在这里和其他生态系统中发现的微生物多样性，我们可以推断出最早的生物的特征。

But you should keep in mind that far less than one percent of microbial diversity is actually pathogenic to humans.

但你应该记住，只有不到百分之一的微生物多样性实际上对人类是致病的。

" In a study some years ago, we profiled the gut microbes of patients with depression and of healthy subjects, and we found that there was much less microbial diversity in the intestines of the individuals with depression, " says Dinan.

“在几年前的一项研究中， 我们分析了抑郁症患者和健康受试者的肠道微生物，我们发现抑郁症患者肠道中的微生物多样性要少得多， ” Dinan 说。