ambient air in造句

• From 2002 to 2004 , the quality of ambient air in urban area of qinzhou city reach national secondary standard
  摘要2002年至2004年，钦州市区环境空气质量达国家二级标准。
• For improving the quality of ambient air in tangshan city completely , making the quality of ambient air of the specified standards , this paper , based on the analysis of air quality , the actuality of contaminant sources and sources of major contaminants of tangshan city , proposes a renovation scheme for preventing air pollution in tangahan city
  摘要为了全面改善唐山市主城区环境空气质量，使唐山市主城区的环境空气质量达到国家规定的标准，本文通过对唐山市主城区空气环境质量、污染源现状以及主要污染物来源的分析研究，提出了唐山市城区大气环境污染综合整治方案。