单词	次矩阵
释义	次矩阵submatrix双向☞次矩阵--子矩阵
随便看	photographic positive photographic print photographic printing photographic printing frame photographic process photographic processing photographic projection photographic radiant photographic reading photographic reconnaissance by satellite photographic record photographic recorder photographic recording photographic--recording photographic recording polarograph photographic reducer photographic reduction photographic refractor photographic reproduction photographic resolution photographic scale photographic screen photographic sensitivity photographic sensitizer photographic sensor