Secondhand smoke comes from both the smoke that smokers exhale (called mainstream smoke) and the smoke floating from the end of the cigarette, cigar, or pipe (called sidestream smoke).
二手烟不仅来自吸烟者呼出的烟气（我们称之为主流烟气），而且来自从烟尾、雪茄或者烟管中飘散出的烟气（我们称之为测流烟）。
Objective To observe the antimutagenicity and filter effect of the main mutagens in mainstream of cigarette smoke by adding curcumin in the filter.
目的研究滤嘴中加入姜黄素对香烟主流烟气的抗突变作用及其对主要诱变成分的滤除作用。
Objective To analyze the content of polycyclic aromatic hydrocarbons (PAHs) in mainstream smoke of 20 brands of Chinese cigarette.
目的检测20种主要国产品牌香烟主流烟雾中多环芳烃与焦油含量，并分析其是否有相关关系。
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