joint

/ʤɔɪnt/

(anatomy) the point of connection between two bones or elements of a skeleton (especially if it allows motion)

中文释义：关节

Regular exercise can help maintain flexibility in the knee joint as you age.

定期锻炼有助于随着年龄增长保持膝关节的灵活性。

The doctor recommended physical therapy to strengthen the shoulder joint after the injury.

医生建议进行物理治疗以加强受伤后的肩关节。