Knee
01
膝盖
the body part that is in the middle of the leg and helps it bend
例子
He felt a sharp pain in his knee after twisting it during a sports activity.
在体育活动中扭伤膝盖后，他感到一阵剧痛。
He got down on his knees to tie his daughter's shoelaces.
他跪下来给女儿系鞋带。
02
护膝, 覆盖膝盖的衣物部分
the part of any garment that covers the knee
03
膝盖, 膝关节
joint between the femur and tibia in a quadruped; corresponds to the human knee
