Colds and flu are caused by viruses, not bacteria.

感冒或流感是由病毒而不是细菌引起。

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But human beings are not bacteria, and good training is not a traumatic event.

但是人类不是细菌，好的训练也并不是创伤性事件。

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Not only do tears keep your eyes lubricated, but they also contain a substance that kills certain bacteria so they can't infect your eyes.

眼泪不仅能使你的眼睛保持湿润，它们还含有一种物质，可以杀死某些细菌，使它们不会感染你的眼睛。

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If it is compromised, then the bees could not defend themselves against pesticides or fungal infections or bacteria or poor nutrition.

VOA: special.2009.09.15

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

Bacteria, or simple organisms, are not always capable of that.

细菌,或者简单有机体,就不能做到

耶鲁公开课 - 生物医学工程探索课程节选

But Hatfill said he worked on viruses, not bacteria, and that he spent his career working to develop ways to combat bioweapons.

CNN: Scientist under scrutiny denies anthrax link

That is important, because not all bacteria that live in people are harmful.

ECONOMIST: Novel antibiotics

However, it is not just bacteria that are being targeted.

BBC: NEWS | Science/Nature | Antarctica's resources 'at risk'