但对于求幂指函数极限，可重使用等价代换定理，微积分学教程中却没有论及。
In calculus, it has not been proved whether or not the equivalent substitution theorem can be applied to the limit calculation of power-exp ential factions.
在强光信号作用下，经过一定的数学代换后，上能级几率的求解可归结为类希尔方程求解；
In a high-intensity optics field, using rotating waves approximation (RWA) and the special transform, the problem of two-level atoms transition attributes to the Hill equation.
在强光信号作用下，经过一定的数学代换后，上能级几率的求解可归结为类希尔方程求解；
In a high-intensity optics field, using rotating waves approximation (RWA) and the special transform, the problem of two-level atoms transition attributes to the Hill equation.
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