dynamical symmetry

例句：

1. 1.The study of the dynamics of a system is crucial for understanding its behavior.
   研究系统的动力学对于理解其行为至关重要。
2. 2.The physicist used a dynamical model to simulate the behavior of the fluid.
   物理学家使用动态模型来模拟流体的行为。
3. 3.The symmetry of the structure is an important aspect of the design, which helps in reducing stress and strain.
   结构的对称性是设计的一个重要方面，这有助于减少应力和应变。