pneumococcosis

例句：

1. 1.He developed a severe pneumococcosis after being hospitalized for several weeks.
   他住院数周后患上了严重的肺炎球菌感染。
2. 2. The patient's condition worsened significantly after the pneumococcosis was treated.
   在治疗肺炎球菌感染后，患者的病情显著恶化。
3. 3.Pneumococcosis is a common cause of pneumonia in young children.
   肺炎球菌感染是儿童肺炎的常见原因。