n.膝盖骨
v.射击某人的膝盖骨
A subluxation occurs when the kneecap is pulled toward the outside of the knee. 当膝盖骨被拉到膝部外面发生半脱位。
Bynum sustained a bone bruise in his left knee and he briefly dislocated his kneecap in the January game. 拜纳姆在一月份的比赛中膝盖骨被撞，导致膝盖骨脱臼。
