吸烟室的颗粒物浓度高于无烟室，吸烟对PM 2.5浓度增加有很大的贡献。
In smoking rooms particulate concentrations are higher than those in nonsmoking room, and smoking has a great contribution to the increase of the concentration of PM2.5.
汉克：恐怕这些办公室都是无烟办公室。
恐怕不行，所有这些办公室都是无烟办公室。
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