Knee
例子
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
护膝, 覆盖膝盖的衣物部分
膝盖, 膝关节