no2怎么记

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一月中旬，伦敦的空气质量10年来首次达标。而以前，首都的二氧化氮（NO2）限量都超标。市长很乐观，环保人士则说还有很多工作要做。Londons air quality is within legal limits in mid-January for the first time in 10 years, City Ha

China to top Japan as luxary muket No2A woman carries a stack of luxury cosmetics at a duty-free store in Sanya, Hainan province, on April 29. [Photo/Xinhua]SHANGHAI - China will replace Japan as the world's second-