关节膜炎

例句：

1. 1.He had a severe joint inflammation that required surgery.
   他患有严重的关节炎症，需要进行手术。
2. 2.Arthritis is a common cause of joint pain and stiffness in older people.
   关节炎是老年人常见的关节疼痛和僵硬的原因。
3. 3.The patient was diagnosed with rheumatoid arthritis, which is an autoimmune disease.
   患者被诊断出类风湿性关节炎，这是一种自身免疫疾病。