matrix fraction

例句：

1. 1. The matrix fraction of a matrix is the ratio of the number of rows to the number of columns.
   矩阵的矩阵分数是行数与列数的比例。
2. 2. In linear algebra, the matrix fraction of a matrix is used to find the determinant.
   在线性代数中，矩阵的矩阵分数用于求行列式。
3. 3. The matrix fraction of a matrix can be used to solve systems of equations by expanding the matrix and solving for the unknowns.
   矩阵的矩阵分数可以通过扩展矩阵并求解未知数来解系统方程。