bend your knees弯曲你的膝盖; 曲膝双语例句1Modification: Cross your hands over your chest and bend your knees onlyslightly.改良:将手交叉放在你的胸前,稍微弯曲膝盖。 2And make sure you bend your knees so you don't hurt your back.要记住曲膝,这样就不会伤到背部。