Chronic bronchitis refers to inflammation and often infection of the bronchia, manifested by persistent, sputum-producing cough.
慢性支气管炎是指炎症和感染的往往支气管，表现出持续，痰生产咳嗽。
Chronic bronchitis refers to inflammation and often infection of the bronchia, manifested by persistent, sputum-producing cough.
慢性支气管炎是指炎症和感染的往往支气管，表现出持续，痰生产咳嗽。
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