synovium

例句：

1. 1.The doctor removed the synovium to relieve his pain.
   医生移除了关节囊以缓解他的疼痛。
2. 2.The patient was diagnosed with a condition that required surgery on the synovium.
   患者被诊断出需要对关节囊进行手术。
3. 3. The research focused on studying the function of the synovium in joint health.
   该研究专注于研究关节健康中关节囊的功能。