unresolved pneumonia

例句：

1. 1. He had a severe case of unresolved pneumonia that required hospitalization.
   他得了严重的未解决肺炎，需要住院治疗。
2. 2. The patient's condition was complicated by unresolved pneumonia, which made it difficult for him to breathe.
   患者的病情复杂，有未解决的肺炎，这使得他呼吸困难。
3. 3. Doctors were able to diagnose the cause of his unresolved pneumonia and prescribe appropriate treatment.
   医生诊断出他的未解决肺炎的原因，并开出了适当的治疗方案。