We took special care to follow a progressive approach, in which we introduce concepts and ideas gradually: however we made sure that every single step is useful for solving a real-life problem.
我们特别采取了渐进的方式，逐渐地引入一些概念与思想：然而，我们仍然能够确定其中的每一步骤都有助于解决真实的问题。
On the progressive formation of a tree, the algorithm of solving a shortest path problem is raised in which a matrix computation is imitated.
依据树的逐步生成原理，仿照矩阵运算，提出了求解捷径问题的生成树算法。
On the progressive formation of a tree, the algorithm of solving a shortest path problem is raised in which a matrix computation is imitated.
依据树的逐步生成原理，仿照矩阵运算，提出了求解捷径问题的生成树算法。
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