Attacks free oxygen radicals, and oxygenates the blood.

抗自由基，促进血液的带氧能力。

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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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So studying the organisms in these oxygen-free caves gives clues about the past.

VOA: special.2010.11.10

We, in fact, borrow oxygen or steal oxygen from the air free of charge.

我们事实上免费从空气中,借或者偷氧气。

麻省理工公开课 - 固态化学导论课程节选

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).

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Much of the damage looks like the result of oxidation by free radicals (oxygen-rich compounds released during cellular energy production).

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These free radicals are oxygen-rich molecules in which one of the oxygen atoms is particularly likely to react with other chemicals.

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