Some environmental protection groups believe that humans will understand the true spirit of Earth Day and try their best to protect the earth.

一些环保组织认为，人类会理解地球日的真正意义，并尽最大努力保护地球。

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There are places on Mars, like Gusev Crater, which resemble soda lakes on Earth, according to an analysis of minerals by NASA's Spirit rover.

根据美国航空航天局勇气号探测器对矿物质的分析，火星上有些地方——比如古瑟夫撞击坑——和地球上的碱湖差不多。

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So how on earth has Apple's playful hacker spirit manifested into such a culture of fear?

那么，苹果的黑客精神到底是如何变成一种恐惧文化的呢？

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In the spirit of Earth Day last Friday, I did some reading on what companies are doing these days to improve environmental sustainability, curious to see whether such programs are finding their way into incentive plans, and whether they are providing tangible results.

FORBES: The Role of Environmental Sustainability in Executive Compensation

At this very hour, the Mars exploration rover Spirit is searching for evidence of life beyond the Earth.

CNN: Bush: 'It is time for America to take the next steps' in space

Druidry's followers are not restricted to one god or creator, but worship the spirit they believe inhabits the earth and forces of nature such as thunder.

BBC: Druidry to be classed as religion by Charity Commission