资料来源: The Tobacco Atlas Fifth Edition, http://www.tobaccoatlas.org/
尼古丁水平的变化
资料来源: The Tobacco Atlas Fifth Edition, http://www.tobaccoatlas.org/
隐藏在香烟烟雾中的有害化学物质
资料来源: The Tobacco Atlas Fifth Edition, http://www.tobaccoatlas.org/
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