克必信对病毒感染无效，比如普通感冒或流感。
Cubicin will not treat a viral infection such as the common cold or flu.
关于网上信息，我们首先需要知道的是如何检测“废话”，这个技术名词是我用来描述那些被愚昧所感染的信息，无效的沟通，或者是蓄意的欺骗。
The first thing we all need to know about information online is how to detect crap, a technical term I use for information tainted by ignorance, inept communication, or deliberate deception.
抗生素对病毒无效，但医生有时给病毒感染的病人用抗生素。
Antibiotics don't work against viruses. But doctors sometimes give antibiotics to patients who have what turns out to be a viral infection.
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