Math Glossary: 这里可以查找像算盘、泰勒斯定理，钝角三角形等等更多的单词以及概念。
Look up words and concepts like abacus, Thales’ theorem, obtuse triangle and a lot more in this special site.
它们也能表现为描述一个可定义概念或理论概念的性质，如“一切三角形都有三条边”。
They may also take the form of describing properties of a definable or theoretic concept, such as 'all triangles have three sides'.
应用亚参元的概念将这些矩阵推广应用于任意三角形单元。
Then these matrice are transformed to arbitrary triangular element by the concept of subparameter.
应用推荐