When atoms and molecules are radiated by ultra intense laser pulse, a series of new non-linear phenomena 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。

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Meanwhile, many phenomena such as chaotic and quasi-period movement that are not interpreted by linear theory appear and bring about a lot of serious accidents.

使用中也出现了许多用传统的线性理论无法解释的现象(如混沌现象，概周期运动等)，并导致了许多严重的事故。

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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.

随着经济行为越来越复杂，只有用动态的非线性模型刻画某些经济现象，才能较好地反映客观现实。

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