The vast source of water could one day be used to generate oxygen or sustain a moon base.

这个巨大的水源也许在未来的某一天可以用来制造氧气或者维持月球基地用水。

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The researchers suggest splitting water into hydrogen and oxygen during the day whenever electricity from solar cells is not needed for anything else.

研究人员建议当白天太阳能电池中产生的电流不做它用的时候来把水分解成氢气和氧气。

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According to Lenton and his colleagues, oxygen levels increased once more before falling to present day levels.

据莱顿和他们的同事们表示，氧气在返回今天的水平之前也曾再次增长过。

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She continued to be given oxygen three times a day until she died.

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Macgillivray, who can struggle to walk, sat throughout his six-day trial breathing oxygen through a tube.

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You may need up to three treatments on the first day of hyperbaric oxygen therapy, followed by twice-daily treatments for up to five days.

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