行星保护

你还需要了解关于行星保护的“先进知识”，这可能意味着在你休假的时候，你要做的不仅仅是读完《安德罗美达菌株》这本书。

You also need to have " advanced knowledge " of planetary protection , which probably means more than just having read The Andromeda Strain whilst on holiday .

美国宇航局希望聘请一名行星保护官，他既要保护我们的行星免受火星生物的侵袭，又要确保人类进入太空时不会污染其他世界。

The US space agency is looking to hire a Planetary Protection Officer who will both protect our planet from the Martians and make sure that humans venturing into space do not contaminate other worlds .

行星磁场保护表面和大气层免受太阳发出的带电粒子影响。

Planetary magnetic fields are shield planets their surfaces and their atmospheres from charged particles that are always coming off the sun .

在它基本度过第一个10亿年的时候，火星这颗小得多的行星丧失了大部分保护它的大气层，于是很多相似性也消失了。

Many similarities disappeared after Mars , a much smaller planet , lost much of its protective atmosphere by the end of its first billion years .