n. hinge joint in the human leg connecting the tibia and fibula with the femur and protected in front by the patella
n. the part of a trouser leg that provides the cloth covering for the knee
n. 膝, 膝盖
vt. 膝行, 用膝盖碰
1. I hurt my knee while playing soccer.
我在踢足球时伤了我的膝盖。
2. She bent down to tie her shoelaces and bumped her knee.
她弯下腰系鞋带时撞到了膝盖。
3. The doctor said I need to strengthen my knee muscles.
医生说我需要增强膝盖的肌肉。