帮忙翻译一段话,谢谢
Although a complete solution of self-focusing and related effects requires extensive numerical calculations, good physical understanding of the problem can still be obtained from solutions with approximations based on experimental findings. This is the emphasis of our discussion in the present chapter. Aside from self-focusing, there also exist a number of other self-action phenomena. Only self-defocusing, self-phase-modulation, and self-steepening are briefly discussed here. 不是搞物理的，专业名词可能不准确，仅供参考。尽管彻底解决自聚焦及其相关效应需要大量的数值计算，但是通过采用基于实验发现的近似处理方法也可以获得对这一问题准确的物理理解。这是我们在本章讨论中的要点。除了自聚焦现象，还有许多其它的自作用现象，这里简要讨论一下自散焦、自相位调制以及自变陡效应。 完全不懂物理,也来试译一下!
虽然完全解决自聚焦及与此相关的问题需要进行大量的数学计算，但通过基于实验结论的估算来得出的解决方法也可以令人直观地了解这个问题。这也是我们本节讨论的重点。除了自聚焦之外，自作用的现象还有很多。在这里我们主要讨论自散焦，自我相位调制和自变陡效应。
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