一口痰就含有成千上万的细菌和病毒，北京有多少人？

One single sputum contains thousands upon thousands of germs and viruses. How many people in Beijing?

youdao

每次你泡澡或淋浴时，都从身上洗掉了细菌和病毒。

Every time you take a bath or shower, you remove germs and viruses from your body.

youdao

也就是说，它们能够破坏细菌和病毒，并能迅速分解有机分子。

That means they destroy bacteria and viruses, and break up organic molecules with alacrity.

youdao

So, not just a spectrum of viruses, but there's viruses and bacteria and parasites and other microorganisms that can cause disease.

所以,不是只有病毒,还有病毒,细菌,寄生虫,和其它各种微生物都能导致疾病

耶鲁公开课 - 生物医学工程探索课程节选

The study of immunology is the study of mechanisms that your body uses to protect itself from mainly from foreign pathogens like viruses and bacteria.

免疫学研究身体,采用何种机制来保护自身,免受外源病原体如病毒和细菌的伤害

耶鲁公开课 - 生物医学工程探索课程节选

We'll learn more about that in a moment, but basically it allows the immune system to distinguish between viral and bacterial pathogens, and respond appropriately depending on the type of pathogen that's there.

我们一会儿会学到不少,但基本上说,这样一来免疫系统,就能够分辨出病毒和细菌病原体,并对相应的病原体类型,产生合适的免疫反应

耶鲁公开课 - 生物医学工程探索课程节选