None of them has an environment with air.

他们中没有一个有空气的环境。

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He told the crowd that the drug would best take effect when consumed regularly in an environment with clean air.

他告诉群众当在一个拥有干净空气的环境中服用的时候，这种药服才会能起到最好的效果。

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An operational environment spectrum of N5A air - craft is compiled with the method.

利用该方法编制了N5A飞机使用环境谱。

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She said Beijing Olympic organizers and Chinese environment authorities are providing the IOC with daily updates about pollution and weather, which can both have an effect on air quality.

CNN: Pollution, Internet, doping dominate Olympics lead-up