"You cannot live without them, nor should you wish to, but they will probably help to kill you in the end," agreed Barry Halliwell of the National University of Singapore, of reactive oxygen species.

新加坡国立大学的巴里·哈利维尔同意上述关于活性氧自由基的说法，他说：“没有活性氧自由基人活不成，谁也不希望这样，但是最后也许正是它们要了你的命。”

youdao

The physicochemical indices of the oxygen produced reach the national standard for medical oxygen.

化学产氧的理化指标达到医用氧国家标准。

youdao

The prototype has a countdown, and power failure alarm function. It produces oxygen stable with low noise, consistents with relevant national product standards.

该样机具有倒计时，断电报警等人性化功能，产氧稳定，噪音低，符合国家相关产品标准。

youdao

Everest without oxygen, exponentially more than a national public-relations campaign budget from Harbin to Hainan.

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Experts from the National Transportation Safety Board, which has been investigating the accident, suspect that a cargo of more than 100 oxygen generators -- which provide oxygen in case of a cabin emergency -- contributed to the fire.

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