爬山后我的大腿疼。

My ___thighs were aching after the climb.

骑自行车是增强大腿力量的好方法。

Cycling is a great way to strengthen your ___thighs.

她在马拉松比赛中拉伤了大腿肌肉。

She pulled a muscle in her ___thigh during the marathon.