dry cough

例句：

1. 1.She has been suffering from a dry cough for the past week.
   她过去一周一直有干咳。
2. 2. After inhaling too much smoke, he felt a dry cough coming on.
   他吸入太多烟后，感到要开始咳嗽了。
3. 3. The doctor prescribed him some medicine to help relieve his dry cough.
   医生给他开了一些药来缓解他的干咳。