Objective: to study the effect of ambroxol as a bronchodilator on infants with wheezing disease.

目的：研究盐酸氨溴索对喘息小儿肺功能的影响。

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Asthma is a chronic disease of the airways characterized by recurrent attacks of breathlessness and wheezing.

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。

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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。

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Millions of people with asthma use inhalers, like Advair, that give them long-lasting relief from the wheezing, suffocating symptoms of the disease.

NPR: Study Sends New Warning on Asthma Drugs

The disease is managed by preventing and relieving the major symptoms - breathlessness, wheezing and coughing - using inhalers and, in extreme cases, with steroid tablets.

BBC: 'Super soup' test in asthma trial