This exercise works the muscles of your legs.

这种操锻炼你的大腿肌肉。

youdao

exercise (works wonders no matter how tired you are);

锻炼（无论你多累都能创造奇迹）；

youdao

exercise (works wonders no matter how tired you are);

锻炼（无论你多累都能创造奇迹）；

youdao