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 environment watchdog said Tuesday.
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 average PM2.5 reading in the period was 62 micrograms per cubic meter, the city’s environmental protection bureau said. In 2015, the level was 80.6 micrograms, down from 95.7 micrograms in 2012.
北京市环保局表示，前三个季度PM2.5的平均浓度为62微克/立方米。2015年，浓度水平是80.6微克/立方米，而早在2012年浓度为95.7微克/立方米。
Air quality was rated excellent or good for 155 days, 17 days more than for the same period last year. Heavy air pollution occurred for 15 days, four fewer days than last year.
空气质量优良天数155天，同比增加17天；空气重污染天数15天，同比减少4天。
Meanwhile, the density of PM10, sulfur dioxide and nitrogen dioxide dropped 14.9 percent, 28.6 percent and 6.7 percent, respectively.
同时，PM10、二氧化硫（SO2）和二氧化氮（NO2）的浓度同比分别下降14.9%、28.6%和6.7%。
Over the past three quarters, Beijing completed improvements on coal-fired boilers producing a total of 3,000 tonnes of steam per hour; eliminated 306,000 aging automobiles; and phased out 224 polluting factories.
过去三个季度里，北京完成了3000蒸吨燃煤锅炉改造工作; 淘汰老旧机动车30.6万辆;清理整治污染企业224家。
