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APEC蓝

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指APEC会议期间北京蓝蓝的天空。在2014年北京APEC会议期间,京津冀实施道路限行和污染企业停工等措施,来保证空气质量达到良好水平,2014年11月3日上午8点,北京市城六区PM2.5浓度为每立方米37微克,接近一级优水平,网友形容此时天空的蓝色为“APEC蓝”(来源:互动百科)。


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