PM2的音标

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Ozone overtakes PM2.5 as the top pollutant in Beijing臭氧超过PM2.5成为北京第一大污染物Warm days come with a downside, as masks cant stop pollutant at ground level in Beijing温暖日子也有一个不好的地方，那就是口罩已经挡不

A worker hangs ornaments at the Ming Dynasty City Wall Ruins Park under a blue sky in Beijing in March, 2017. LIU PING/CHINA DAILYChina has pledged to cut PM2.5 concentration by at least 15 percent year-on-year in 28 nor

导读:据北京环保部门星期二称，今年前三个季度北京PM2.5的浓度同比下降了10.1%。The density of fine particulate matter PM2.5 in Beijing decreased by 10.1 percent year on year in the first nine months of the year, the local en

在网上，雾霾的英文通常有以下3种：smoke，haze以及smog。究竟哪种说法最准确?这就要从雾霾的成分说起了。《穹顶之下》告诉我们，雾霾是PM2.5等可吸入颗粒物悬浮在空中形成的。它的来源主要是煤炭燃烧、汽车尾气和光化学污染。Haze A sli

英语新闻：潘石屹现身上海地铁测PM2.5数值Pan Shiyi tests PM 2.5 on Shanghai subwayPan Shiyiarrived in Shanghai on Thursday, and took a 15-minute ride on Subway Line 2 from Hongqiao Airport to Jing'ansi station. He said his