differential automorphism

例句：

1. 1. The differential equation is a key tool in studying the behavior of systems.
   微分方程是研究系统行为的关键工具。
2. 2.The differential equations describe how changes occur over time.
   微分方程描述了随时间变化的规律。
3. 3.The differential automorphism of a group is a way to study its structure and properties.
   群的差分同构是一种研究其结构和属性的方法。