rectus femoris

例句：

1. 1.The patient's leg was in a cast for the past six weeks.
   病人的腿已经穿了六周的石膏。
2. 2. The doctor advised him to exercise regularly to strengthen his muscles.
   医生建议他定期锻炼以增强肌肉。
3. 3.During the race, he used his rectus femoris to push himself forward.
   比赛中，他用股直肌推动自己前进。