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He was not good at algebra in middle school.

他中时不擅长。

In algebra, the sign X usually denotes an unknown quantity.

在里, 符号X常用来表示未知。

Four years after he graduated from school, Tom decided to dust off his algebra book.

汤姆从校毕业四年后, 决意重温。

His classmates were labouring with elementary algebra.

他们正在绞尽脑汁地演算初等题。

As its application, a multi-component system similar to the BPT hierarchy is obtained.

最后利用外积性质构造了一个3 维loop ,由此可设计出许多新等谱问题，作为应用，本文得到了一个类似多分量Boite-Pempinelli-Tu(BPT)族。

If you want to be a draftsman, a machinist, a molder, or a patternmaker, you'll need algebra and geometry and even trigonometry.

如果你想成为手艺人、缝纫、造型或制模，你需要和几何，甚至三角。

Further more,we prove that the cohomotopy groups is isomorphic to K1 -group of the continuous algebra on topological boundary of bounded domains in C.

在复平面C中，任意有界域拓扑边界上连续函K_1-群与其边界上上伦群构。

Using the notion of coefficient matrix and maximal element.We prove that the Lie algebra is semi-simple and it has no abelian two dimensional subalgebra.

利用系矩阵和极大项，证明了这类李是半单李没有二维交换子。

The large deflection problem of cantilever beams was studied by means of the biparametric perturbation method and the first order derivative substitution from pseudolinear analysis approach.

利用拟线性分析方法中一阶导换对基本方程进行了简化处理,将基本微分积分方程转化为非线性方程组,并结合双参摄动研究了悬臂梁大挠度问题。

A hypercomplex model of acoustic vector sensor array is introduced.The hypercomplex number is used to model holistically the four output signal components of an acoustic vector sensor.

摘要将超复引入矢量水听器信号处理领域，用超复来整体表示了矢量水听器输出4个信号分量，并建立了矢量水听器阵列超复模型。

In this paper, we proved that the definition of a semilattice as a universal algebra and the definition of a semilattice as a partial ordered set are equivalent.

本文中，我们证明了作为泛半格定义与作为偏序集半格定义是等价。

With the request of geometry modeling system and application of the concept about complexes algebraictopology in the field of industrial production , the theory of non-manifold model come into being.

业产品几何造型技术发展要求,以及拓扑复形等概念引入到几何造型中,因此产生了非流形几何造型理论。

In this paper, the conclusion is that the intersection of lie subring of a Lie group is a Lie subring is obtained, moreover,it gives the Lie algebra of the Lie subring.

文章通过李子群性质得出了李群两个李子群交依然是李子群结论,进而得出这一李子群李形式。