呼吸困难

例句：

1. 1. He was short of breath afterrunning for a long time.
   他跑了很久之后喘不过气来。
2. 2. Shehad a bad case ofasthma, which made it hardfor her to breathe.
   她得了重感冒，这让她很难呼吸。
3. 3. The patient's chest was heaving with eachbreath, indicating severe respiratory distress.
   病人的胸部随着每一次呼吸都在起伏，这表明有严重的呼吸窘迫。