The dynamics of air pollution in Chaoyang during recent years was analyzed, in terms of atmospheric environmental monitoring data in the year of 2003.
根据2003年朝阳市大气环境监测资料，分析了朝阳地区大气污染的时间变化特征。
There was a number of stations throughout the London Administrative County routinely monitoring atmospheric pollution.
伦敦州管辖范围内有许多站定期地监测大气污染。
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