吸烟

Hello,everyone! My name is Changhaofeng, my major is the Electrical engineering. It’s my great honour to be here for this speech.Today I will introduce the risks of smoking,the main purpose of which is to warn us smoking is hazardous['hæzədəs] to our health and we should be away from smoking. So my topic in this speech is what are the risks of smoking. Scientific researchers show that smoking can lead to heart disease, cancer and other problem. The World Health Organization says diseases linked to smoking kill at least two million five-hundred-thousand persons each year. It is estimated that approximately 50 million Americans smoke. 400,000 people are thought to die in America each year from smoking related causes. [kɔ:ziz] Yet even when smokers are presented with these figures they still smoke. Do you know cigarette ingredients[in'ɡri:diənt]? It consists of carbon monoxide[mɔ'nɔksaid, Metal cadmium['kædmiəm], Tar[tɑ:], Radioactive material[mə'tiəriəl], Nitrosamine[,naitrəusə'mi:n], Nicotine['nikəti:n,, and so on. They are all harmfor to our health. In recent years, More and more women have joined the ranks of smoking. Many women believe that smoking is a very elegant['eliɡənt] posture ['pɔstʃə] .Smoking is also liked by a woman because of loneliness and sadness. The study also found that women smokers, the average serum HDL (好胆固醇) lower than non-smokers, the former heart attack was significantly higher than the latter A large number of inhaled carbon monoxide to make the body hypoxia, can increase the above diseases . Nicotine['nikəti:n] can speed up heart rate, High blood pressure Smoking can damage lung[lʌŋ] function, sputum['spju:təm]（痰） and toxic ['tɔksik] substances can not be ruled out排除, bacteria[bæk'tiəriə] reproduced. Long-term stimulation would cause the formation 形成of chronic['krɔnik]慢性的 bronchitis[brɔŋ'kaitis] 支气管炎 and chronic['krɔnik] 慢性的 obstructive airway. Second-hand smoke harm to passive smokers than active smokers （主动吸烟者）do not light, especially for particularly serious crimes against children. Survey, in China, The main victims of passive smoking are women and children, Although they do not smoke themselves, but often in the family, public places, suffered second-hand smoke of others. May 31 is World No Tobacco Day, A global scale, there are a large number of epidemiological['epi,di:miə'lɔdʒik]流行病学的 studies confirm that (大量流行病学研究证实 )smoking is the primary risk factor （首要危险因素 ）for lung[lʌŋ] cancer（肺癌）. World Health Organization （世界卫生组织）in November 1987 recommended（建议） that the annual（每年的） April 7 as the "World No Tobacco Day" and in 1988 started. Smoking is harmful to health. No smoking, our lives will have a brighter future. If we smoke, life will become more and more short . In order to stay more in the world, please care for our bodies. On the whole ，smoking is very harmful and it does no good！ That is all. Thank you!