Holding the breath is the clearest observable sign of incorrect posture or acture .
屏息是不正确的姿态或行态的最明显的可观察到的信号。
The main feature of correct acture or posture in all procedures depending on and existing within the scope of voluntary action is reversibility .
任何依赖和附属于意志控制行为范围的做事上，正确的行态或姿态的主要特征是可逆转性。
acture