Trigonum lumbale

例句：

1. 1.The doctor examined the patient's leg and found a fracture in the femur.
   医生检查了患者的腿，发现大腿骨骨折。
2. 2.After the surgery, the patient had to wear a cast on his femur for six weeks.
   手术后，患者不得不用石膏固定他的大腿骨六周。
3. 3. The injured player was taken to the hospital with a broken femur.
   受伤的运动员被送往医院，大腿骨骨折。