吸烟几乎是有百害而无一利。烟民手中的烟头上燃烧的不仅仅是烟草,燃烧的还有自己的胃,和宝贵的健康。吸烟时,烟草的烟雾通过口腔吸入人体,经过鼻咽部、气管、支气管到达肺部,有毒烟雾行径的部位会因此而发生癌变,这一点非常容易为人所理解。2010年的一项调查显示,中国人对“吸烟会引起肺癌”的知晓率达到了77.5%。这说明大多数人都多少知道吸烟对呼吸系统的危 There is almost no harm in smoking. The cigarettes in the hands of smokers burn not only tobacco, but also their own stomach and their precious health. When smoking, tobacco smoke inhalation through the mouth, through the nasopharynx, trachea, bronchus to the lungs, the site of toxic smoke will cause cancer, which is very easy to understand. A 2010 survey showed that Chinese people’s awareness of smoking as a cause of lung cancer reached 77.5%. This shows that most people know how much smoking is at risk to the respiratory system