方程组的英文：
(math.) simultaneous equations
system of equations

参考例句：

Very general systems of differential equations can be reduced to the normal form.
形式很普通的微分方程组可以化为正规的形式。

The underlying method is based on the simple wave solutions of a system of hyperbolic partial differential equations
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 systems of equations obtained in most practical problems are not only symmetric but also banded
我们在大部分实际问题中得到的方程组不仅是对称的而且还是带状的。

They are equivalent in the sense that they arise from the same set of equations.
从它们都是由同一个方程组产生的这一意义上来看，它们自然是等价的。

The most powerful methods used in the solution of such systems are iterative methods, discussed subsequently
解这样方程组最有效的方法是下面讨论的叠代方法。

math是什么意思：
abbr. 数学

Usually y is a function in math.
X is not a function in math.

I have a math problem.
我有一道数学题不会做。

I have to revise for maths.
我要复习数学。

simultaneous是什么意思：
adj.【无比较级，最高级】同时的，同时发生的

We need a simultaneous interpreter.
我们需要一个同声翻译。

The advanced stage of this method is simultaneous interpretation.
此法的高等阶段为同声传译。

the policy of simultaneous development of industry and agriculture
工业和农业同时并举的方针

equations是什么意思：
n. 方程式，等式；相等；同等；反应式

an integral equation
积分方程

Tom，please expand this equation.
汤姆，请你展开方程式。

The equations are written in rectangular coordinates.
这些方程是在直角座标系中写出的。