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北京正享受著五年來空氣質(zhì)量最佳的冬天英語美文
Beijing is enjoying its best winter air quality in five years, Beijing Youth Daily reported Thursday.
據(jù)《北京青年報》星期四報道，北京正享受著五年來空氣質(zhì)量最佳的冬天。
The yearly average concentrations of particulate matter with a length of 2.5 microns or less, known as PM2.5 and which damage the lungs when inhaled, dropped by 20.5% to 58 micrograms per cubic meter in 2017.
2017年，小于或等于2.5微米的顆粒物即PM2.5的年平均濃度下降了20.5%，達到58微克/立方米，呼吸時它會傷害人的肺部。
According to the local environment agency, the city has met the national standard of sulfur dioxide density. However, the concentrations of three other major pollutants: carbon dioxide, PM10, and PM2.5, are still out of limits. To improve Beijing’s air quality is still a long-term process.
根據(jù)當(dāng)?shù)丨h(huán)保局的說法，北京市已經(jīng)達到了國家二氧化硫濃度標準。然而，其他三種主要污染物——二氧化碳、PM10和PM2.5的濃度仍然超出了限制值。改善北京的空氣質(zhì)量仍然是一個長期的過程。
The number of days during which the air quality was rated “excellent” or “good” was 226, up by 28 compared to 2016, while the number of days when the air was heavily polluted stood at 23, down by 16.
空氣質(zhì)量被評為“優(yōu)秀”或“好”的天數(shù)為226天，比2016年增加了28天，而空氣污染嚴重的天數(shù)為23天，減少了16天。
Over the last five years, the PM2.5 levels of each district in Beijing have experienced significant drops. Li Xiang, an official with Beijing Municipal Environmental Protection Bureau said that Beijing will make more efforts to lower the PM2.5 concentration to 56 micrograms per cubic meter in 2020.
在過去的5年里，北京各區(qū)PM2.5的值都有顯著下降。北京環(huán)保局的一名叫李翔的官員說，北京將作出更多的努力，致力于在2020年將PM2.5指數(shù)下降到56微克/立方米。
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