慢性支气管炎是一种形式的慢性阻塞性肺疾病。
Chronic bronchitis is one of the forms of chronic obstructive lung disease.
慢阻肺是一种吸烟引起的肺部疾病，也包括肺气肿和慢性支气管炎。
COPD is a disease of the lungs caused by smoking and includes the conditions of emphysema and chronic bronchitis.
慢性阻塞性肺简称慢阻肺，是一种危及生命的疾病，通常是由常年吸烟造成的。
Chronic obstructive pulmonary disease, or COPD, is a life-threatening condition commonly caused by years of smoking.
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