It may occur in previously normal lungs or be superimposed on underlying bronchitis or other respiratory disease, e. g. bronchiectasis or carcinoma.
3
吸烟不仅会导致肺癌,但许多其他的疾病如心脏病,喉咙痛,头痛,慢性支气管炎,肺气肿~,~,等。
Smoking not only leads to lung cancer, but many other diseases such as heart attacks, sore throat, headache, chronic bronchitis ~, pulmonary emphysema ~, etc.