polaity formula

例句：

1. 1. The polaty formula is crucial for understanding the behavior of a system.
   动力公式对于理解系统的行为至关重要。
2. 2. The energy conservation law is often used to describe the polaty formula in thermodynamics.
   能量守恒定律在热力学中常用来描述动力公式。
3. 3. The polaty formula can be used to calculate the maximum power that a motor can produce.
   动力公式可以用来计算电机的最大输出功率。