deformity of knee-joint

例句：

1. 1. The patient's knee joint was severely deformed due to an injury.
   由于一次受伤，患者的膝关节严重变形。
2. 2.The child's knee joint was dislocated during the game.
   在比赛中，孩子的膝盖关节脱臼了。
3. 3.The doctor performed surgery on the patient's knee joint to correct the deformity.
   医生为患者进行了手术，以纠正膝关节的畸形。