Chronic bronchitis is a condition associated with excessive tracheobronchia mucus production sufficient to cause cough with expectoration for at least 3 months of the year for more than 2 consecutive years.
Chronic bronchitis is a condition associated with excessive tracheobronchia mucus production sufficient to cause cough with expectoration for at least 3 months of the year for more than 2 consecutive years.
由于气管、支气管粘液分泌过多，引起咳嗽咯痰，1年中至少有3个月并连续2年以上者，称为慢性支气管炎。