jogged joint

例句：

1. 1. The doctor advised him to exercise regularly to maintain his healthy joints.
   医生建议他定期锻炼以保持健康的关节。
2. 2. The old man had a painful joint in his left arm that wouldn't stay still.
   老人的左臂有一个疼痛的关节，不能保持静止。
3. 3.The scientist discovered a new way to improve the durability of joints in robotics.
   科学家发现了一种新的方法来提高机器人关节的耐用性。