This job is to protect the earth from germs on things brought back from other planets.

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。

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Experts met in Washington DC in June to discuss how to protect Earth from the ferocious flares, which are expected sometime around 2013.

6月份专家们在华盛顿商讨，面对可能在2013年出现的剧烈太阳耀斑，如何保护地球安危。

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The magnetic field associated with these particles helps protect the Earth from cosmic rays by deflecting them from the planet.

地磁场同这些粒子相结合令宇宙射线发生弯曲，从而帮助地球避开来访的宇宙射线。

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Rockman imagines a terrible future in which plants and animals must be sent into space to protect them from Earth's pollution.

VOA: special.2010.12.15

The magnetic field associated with these particles helps protect the Earth from cosmic rays by deflecting them from the planet.

ECONOMIST: Climate change: Bubbling up | The

The PLANETARY DEFENSE is not to protect Earth from men from Mars.

FORBES: 'Doomsday Asteroid' Bigger Than Expected

The EarthView survey, conducted by Frederick Schneiders Research on behalf of the National 4-H Council and Honda, found that teen-agers and baby boomers agree that government and industry are falling short of their environmental obligations and that time is running out to protect the Earth from permanent environmental damage.

CNN: Kids on mountain