环境烟草烟雾，室内空气污染物的一个主要的来源
目的研究分析吸烟及环境烟草烟雾暴露与膀胱癌的关系。
Objective:To evaluate the relationship between smoking and environmental tobacco smoking(ETS)with the risk of bladder cancer.
今年的无烟日提倡100%无烟环境，作为防止世界各地人们接触二手烟草烟雾的唯一有效途径。
This year's Day promotes 100% smoke-free environments as the only effective way to protect people everywhere from exposure to second-hand tobacco smoke.
创造100%的无烟环境，是保护人们免受二手烟草烟雾有害影响的唯一途径。
Creating 100% smoke-free environments is the only way to protect people from the harmful effects of second-hand tobacco smoke.
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