By constructing principal function of a charged particle in electromagnetic field and using conservative system's Lagrange equation two formulas in Maxwell's equations are induced.
构造了带电粒子在电磁场中的作用量，借助于保守力系的拉格朗日方程，导出了麦克斯韦方程中的两个式子。
The motion equation satisfied by an induced polarization of a two level atom interacting with laser pulse is derived by using a nonperturbation method.
通过非扰动方法导出了与线偏振激光脉冲相互作用的二能级原子的诱导极化所满足的运动方程。
Substitution Factor is induced in the equation established on the concept of stabilization of falling point, which has vesatility in selecting equation by the way of motion.
在以落点稳定为基础建立的方程中引入了“替换因子”，它使方程在运动形式的选择上具有广泛性。
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