Smoking is the most common cause of C.O.P. 吸煙是導致慢性阻塞性肺疾病的最常見(jiàn)因素。
The Canadian Lung Association Web site explains that C.O.P.D. is the new name for emphysema and chronic bronchitis. 加拿大肺健康協(xié)會(huì )的網(wǎng)站上解釋到慢性阻塞性肺疾病是對肺氣腫和慢性支氣管炎新的稱(chēng)謂。