在大多数章节有数学要求，不过通常只是初等代数和函数图象，我希望大多数读者对这些要求没有问题。

There is some mathematics in most chapters, but it's usually just elementary algebra and plots of functions, which I expect most readers will be okay with.

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算术和初等代数中普通的数通称纯量。

The ordinary numbers of arithmetic and elementary algebra are known as scalars.

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首先，矩阵的初等变换在高等代数中的用途很广，且使用方便。

First, the matrix of elementary transformation in the use of advanced algebra in a very wide and easy to use.

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