关节

例句：

1. 1. Thedoctor examined her knee joint carefully.
   医生仔细检查了她的膝盖关节。
2. 2. The scientist discovered anew way to treat arthritis.
   科学家发现了一种新的治疗关节炎的方法。
3. 3. Thedancer's movementswere precise and graceful,demonstrating the importance of joint health.
   舞者的动作准确而优雅，展示了关节健康的重要性。