As for the increasing air pollution,___________________(我们必须清醒地认识到这是全人类共同面临的一种威胁).

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问题 As for the increasing air pollution,___________________(我们必须清醒地认识到这是全人类共同面临的一种威胁).

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答案AS for the increasing air pollution, we must be clearly aware that it threats all human beings.

解析 至于日益恶化的空气污染问题,我们必须清醒地认识到这是全人类共同面临的—种威胁。
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