基本的方法是以双曲型偏微分方程组的简单波解为根据的。

The underlying method is based on the simple wave solutions of a system of hyperbolic partial differential equations.

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在实验结果中，还观察到简单波逐渐饱和的情况以及叠加于锯齿波上的大量高频调制部分。

In experimental results, one observes clearly the gradual saturation of simple waves and high frequency modulations on the sawtooth waveform.

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此格式对于计算压差方程只包含强简单波的黎曼解是适合的，对于计算压差方程的包含弱简单波的黎曼解则不适用。

According to our numerical experiments, this scheme is good for computing the Riemann solution consist of only strong simple waves, but bad for the Riemann solution which contains weak simple waves.

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But for now let's simply say that we have a diffraction which we know occurs only by wave-like behavior and it involves the use of x-rays. Why x-rays?

但现在让我们来简单假设一下,我们知道,只波才发生衍射,而且衍射涉及了X光的使用，为什么是X光？

麻省理工公开课 - 固态化学导论课程节选