师建华
Shi Jianhua
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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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