strictly triangular matrix

例句：

1. 1. Thestrict triangular matrix of the problem makesit difficult to solve.
   问题的严格三角形矩阵使得解决起来很困难。
2. 2. The stricttriangular matrix is achallenge for computer scientists.
   严格的三角形矩阵是计算机科学家的挑战。
3. 3. The strict triangular matrix is used in many applications,such as image processing and signal analysis.
   严格的三角形矩阵在许多应用中被使用，如图像处理和信号分析。