哮喘是常见的过敏性呼吸道疾病，一般是因对某些外界物质的反应而致。患者呈现气管收缩，发炎及分泌过量黏液。
Asthma is a common allergic respiratory condition which involves constriction as well as inflammation of airways lined with excessive amount of mucus in response to certain triggers.
哮喘是常见的过敏性呼吸道疾病，一般是因对某些外界物质的反应而致。患者呈现气管收缩，发炎及分泌过量黏液。
Asthma is a common allergic respiratory condition which involves constriction as well as inflammation of airways lined with excessive amount of mucus in response to certain triggers.
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