By studying bacteria that flourish in the oxygen-free water, scientists hope, among other things, to learn how simple life-forms can lead to more complex ones.

通过研究这些生活在无氧环境下细菌，科研人员希望了解这些简单的生物是如何进化成更为复杂的生物的。

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Status: Last year, scientists found a plentiful raw material that can free oxygen from water.

现状：去年，科学家发现大量能把氧气从水中释放出来的原材料。

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It is the only planet known to have an atmosphere containing free oxygen, oceans of liquid water on its surface, and, of course, life.

也是我们已知的唯一拥有含氧大气、表层液态水海洋以及生命的星球。

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Next, the denim manufacturer incorporated ozone processing to give its garments the washed-down effect sans water (when ozone decomposes, it reverts to free oxygen).

FORBES: Levi's To Sell Water-wise Jeans