答：哮喘是一种慢性呼吸疾病，特征是呼吸急促和喘息反复发作。
A: Asthma is a chronic breathing disorder characterized by recurrent attacks of breathlessness and wheezing.
哮喘是一种慢性病，以呼吸困难和喘息反复发作为特征，其严重程度和发作频率因人而异。
Asthma is a chronic disease characterized by recurrent attacks of breathlessness and wheezing, which vary in severity and frequency from person to person.
哮喘是一种慢性呼吸道疾病，以呼吸急促和喘息反复发作为特征。
Asthma is a chronic disease of the airways characterized by recurrent attacks of breathlessness and wheezing.
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