Matrix printer: printer that produces images formed from dots that conform to matrix unit.

点矩阵印字机：用点子依照矩阵形式而造成图文的印字机。

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Calculation and storage are trouble for high level matrix. For the sake of these problems, the storage method of the sparse matrix, unit matrix, symmetry matrix are discussed in this paper.

高阶矩阵运算和存储量都特别大，为了减少运算和存储量，本文讨论了稀疏矩阵、单位矩阵、对称矩阵的存储方法。

youdao

Calculation and storage are trouble for high level matrix. For the sake of these problems, the storage method of the sparse matrix, unit matrix, symmetry matrix are discussed in this paper.

高阶矩阵运算和存储量都特别大，为了减少运算和存储量，本文讨论了稀疏矩阵、单位矩阵、对称矩阵的存储方法。

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