Happily, these microbes are mostly harmless.

幸运地是，这些微生物大部分都是无害的。

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According to wireless security expert Joshua Wright, the bug has been around for about four years now and, although mostly harmless, could provide an entry point for mal-intentioned visitors.

根据无线安全专家Joshua Wright，这个bug大约已经有四年了，虽然大多数是无害的，但是会给那些恶意访问者提供切入点。

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This will result in PHP reporting a warning every time an uninitialized variable is used, each bad file access, and other (mostly) harmless errors, but might also represent a potential attack vector.

设置更改后，每当使用未初始化的变量、进行错误的文件访问及发生其他（大多数）无害错误时，PHP 都会报告一条警告消息，但也存在这是一个潜在攻击矢量的可能性。

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When ESPN was invaded by Unicorns last year the results were mostly harmless as developer Keith Lam explained.

FORBES: Newsweek Reports The Zombie Invasion

They found that 48 percent of beverages obtained from soda fountains contained coliform bacteria, 11 percent contained E. coli (which are mostly harmless, but some can cause diarrhea, urinary tract infections, respiratory illness and pneumonia), and 17 percent had Chryseobacterium meningosepticum (which could sicken newborns or adults with weakened immune systems).

CNN: Soda fountains contained fecal bacteria, study found

Mostly, the average drunk is obnoxious but harmless.

BBC: NEWS | UK | Magazine | Alone with the yobs