北京市环保局总工程师于建华承认，去年空气质量的提升没有大到可以改变居民对整体空气质量的感觉。

Yu Jianhua, the Beijing environmental bureau's chief engineer, conceded that the improvements made last year were "not huge enough" to change residents' perception of overall air quality.

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对北京民众公共行为的实地观察是一次为迎接奥运、提升市民素质而实施的北京市人文行动的现场观察工作。

For the purpose of having an optimal Olympic Games at 2008, Beijing's citizens should have much better civilized their behavior during the Games.

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