“姿势的”的英语？

带有芭蕾舞演员那种稳健姿势的动作.Moving with the assured poise of a ballet dancer.这种仪器是用来矫正不良姿势的.This kind of device is used to correct bad posture.平衡: 保持特定姿势的稳定状态.Balance: A static position which holds a distinct shape....