原文：

吸煙之危害，可謂大矣，其嚴重性是不能低估的。吸煙污染空氣，損害健康，使肺癌發病率大大增加。為了使各國人民關注煙草的盛行及預防吸煙導致的疾病和死亡，世界衛生組織已將每年的5月31日定為“世界無煙日”。

癮君子們說，一天飯不吃可以，一個時辰不抽煙就難捱了，不能戒。只要真正意識到吸煙有百害而無一利，于人于己都是一種禍害，就有可能下決心擺脫煙草的誘惑。戒煙貴在堅持，堅持下去就是收獲。

參考譯文：

Smoking does great harm to human and its gravity should not be underestimated. Smoking pollutes air, damages health, and increases the incidence of lung cancer. To arouse the awareness about the prevalence of tobacco in all the countries and to prevent smoking-induced diseases and deaths, the WHO (World Health Organization) has defined May 31st in every year as World No-Tobacco Day.

The tobacco addicts say that smoking is impossible to quit because they could do without meals in a day but would feel tortured without tobacco in two hours. However, when one realizes that smoking is harmful in many ways but beneficial in no way and that it is a curse to others as well as to he himself, he will be determined to resist the temptation of tobacco. To quit smoking requires persistence and so long as one persists, he'll be rewarded.