英语语法分析

All matrices can be factorised, usually in a variety of ways.

所有矩阵通常都能以各种方式因式分解。

However, Laplace expansion is efficient for small matrices only.

但是，拉普拉斯展开仅对小型矩阵有效。

It means they are the inverse matrices.

这就意味着它们是互逆的两个矩阵。