Abstract: This article mainly analyze urban air quality present situation in China and the key factors affecting urban air quality study.

摘要：本文针对我国城市的空气质量现状及影响城市空气质量的主要因素进行分析研究。

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Abstract: This article mainly analyze urban air quality present situation in China and the key factors affecting urban air quality study.

摘要：本文针对我国城市的空气质量现状及影响城市空气质量的主要因素进行分析研究。

youdao