1939年以来,已经进行了许多科学研究来确定吸烟是否对健康有害。研究结果的趋势一致表明吸烟对健康有严重危害。各研究组所进行的研究无可置疑地表明,吸烟草,特别是抽香烟和寿命的缩短是有联系的。这个领域内的大多数研究人员认为,抽香烟是将肺癌和喉癌的重要因素,并且认为膀胱癌和口腔癌也与吸烟有关。吸烟的男人比不吸烟的男人心脏病的死亡率要高。他们认为女性吸烟者所受影响较小,因为他们吸烟时吸得不 Since 1939, many scientific studies have been conducted to determine whether smoking is harmful to health. The trend of the research results consistently shows that smoking has a serious health hazard. Studies conducted by the study groups have undoubtedly demonstrated that tobacco smoking, especially smoking cigarettes, are associated with shortened life expectancy. Most researchers in this field believe smoking cigarettes is an important factor in lung and laryngeal cancer and that bladder and oral cancers are also associated with smoking. Smoking men had higher rates of heart disease than non-smokers. They think female smokers have less impact because they smoke no