1、The femur is the longest and strongest bone in the body, also known as the thighbone.
大腿骨是身体中最长、最坚固的骨骼，也被称为股骨。
2、He fractured his thighbone while playing football and had to undergo surgery.
他在踢足球时骨折了大腿骨，需要接受手术治疗。