serrer les reins，意为「收紧腰（背）部」。芭蕾教学用语，表示身体应保持直立、躯干充分上提，臀部与腹部肌肉收紧。
收紧腰部
serrer les reins，意为「收紧腰（背）部」。芭蕾教学用语，表示身体应保持直立、躯干充分上提，臀部与腹部肌肉收紧。
To tighten the loins. A term used in ballet teaching to indicate that the body should be erect and the torso well lifted, with the buttocks and abdominal muscles tightened.