Now, in order to express this kind of linear relation, we can use matrices. A matrix is just a table with Numbers in it.
现在，为了说明这种线性关系，我们可以用矩阵，矩阵就是一个含有数字的列表。
2
The growth share matrix started a fashion for matrices among management consultants. For a while no self-respecting report or theory was complete without one.
增长份额矩阵掀起了企业管理和咨询业中应用矩阵的热潮，一时间没有哪个自重的报告或理论中少得了矩阵。
3
Note that the inv function USES SPL nested lists to represent matrices, as there is no matrix type in SPL.