n.大腿骨
The old man's son thus fell off the horse and broke his thighbone. 結(jié)果，塞翁的兒子從馬身上摔下來把大腿骨跌斷了。
The knee is the joint where the thighbone meets the large bone of the lower leg. 膝蓋是大腿骨和小腿脛的連接處。
