be short of breathto be unable to breathe easily, especially because you are unhealthy 呼吸短促,气喘吁吁〔尤因身体不健康〕 He couldn’t walk far without getting short of breath. 他路走长了就会气喘吁吁。
be short of breath• He sleeps badly and is short of breath on exertion.
→ be short of breath at short1(6)