1·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。
2·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。
3·A: Asthma is a chronic breathing disorder characterized by recurrent attacks of breathlessness and wheezing.
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。
4·After about 20 minutes, wheezing and coughing will be reduced and you come back from an emergency situation.
约20分钟后，喘息和咳嗽减轻，你从紧急情况中回过来了。
5·Then the sound of my own breathing, almost a wheezing.
然后是我自己呼吸的声音，几乎是喘息。