Also, not all germs are harmful; we need friendly bacteria that live on our skin to help fight off bad bugs, and bacteria in our mouth and gut help digest our food and prevent illness and disease.

此外，并非所有的细菌都对人体有害；我们的皮肤上需要有“友好”的细菌来帮助抵抗“坏”的细菌，口腔和肠胃里的细菌可以帮助我们消化食物，防止疾病。

youdao

Other work has examined the role of viruses and gut bacteria in contributing to body weight and disease.

其他研究还调查了病毒和肠道细菌在引发体重增加和疾病方面的角色。

youdao

But we also have the highest rates of inflammatory bowel disease, or ibd-when the immune system mistakenly attacks intestinal cells and friendly gut bacteria.

但我们感染上炎症性疾病(简称IBD)的概率仍然很高，因为免疫系统会错把肠道细胞和友好的肠道细菌当做攻击对象。

youdao

He and his colleagues have been exploring how altering gut bacteria might influence the risk of heart disease.

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