求翻译：吸烟可以引起多种疾病，污染环境; 吸烟致癌已经公认。吸烟是许多心、脑血管疾病的主要危险因素，是慢性支气管炎、肺气肿和慢性气道阻塞的主要诱因之一。吸烟可引起胃酸分泌增加吸烟对妇女的危害更甚于男性，吸烟妇女可引起月经紊乱、受孕困难、宫外孕、雌激素低下、骨质疏松以及更年期提前。是什么意思？

Smoking can cause a wide range of diseases, pollution of the environment; Smoking causes cancer has been accepted. Smoking is a lot of heart, the main risk factors of cerebrovascular disease, chronic bronchitis, emphysema, and chronic airway obstruction in one of the main incentives. Smoking may cause gastric acid secretion and increase the hazards of smoking on women more than men, women smoking can cause ectopic pregnancy, pregnancy difficulties, menstrual disorders, osteoporosis and low estrogen, menopause earlier.