本文用代数的方法求出了耦合谐振子的简正模，过程简单且物理意义清晰。

Normal mode of coupled harmonic oscillator is obtained by means of algebra, the procedure is simple and the physical meaning is clear.

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所以第三…用代数的方法审视这个问题是使用我称之为a的矩阵表示的矩阵表格。

So the third... the algebra way of looking the problem is the matrix form, in using a matrix that I'll call it a.

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讨论粗糙集代数与格蕴涵代数的关系以及由粗糙集代数构造格蕴涵代数的方法。

The relation between rough set algebra and lattice implication algebra was studied, and the method of constructing lattice implication algebra from rough set algebra was presented.

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Let's say you have to go through three or four operations to get a final number, well, do it algebraically.

让我们说,你不得不通过3-4个操作,才能得到最终的数，好吧，用代数方法求解。

麻省理工公开课 - 固态化学导论课程节选