这份工作是为了保护地球免受从其他星球带回来的东西上的细菌侵害。
This job is to protect the earth from germs on things brought back from other planets.
对中国人来说，他们认为喝开水是保护自己免受有害细菌侵害的最简单方法。
For the Chinese, they thought drinking boiled water was the easiest way to protect themselves from the harmful bacteria.
未受损的皮肤可以保护身体不受细菌侵害。
Intact skin can protect the body from being invaded by germs.
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