When atoms and molecules are radiated by ultra intense laser pulse, a series of new non-linearphenomena which can't be interpreted by perturbation theory appears.
实验表明在超强超短激光脉冲的作用下，原子分子会出现一系列微扰理论无法解释的新现象。
2
As economic behavior being more and more complicated, some economic phenomena cannot reflect the objective reality well till they are portrayed with the dynamic non-linear model.