单词：oriented graph
oriented graph的用法和样例：
例句
- And the coefficients of eigen-polynomial expressions were closely related to the circular sets of a directional graph.而特征多项式的系数与有向图的圆族有着密切的关系。
- In a directed graph, the decision variables of the shortest path computation must be determined by a constraint that is called Kirchoff's constraint.摘要已知一个有向图，求解两点间的最短路径的决策变量满足基尔霍夫约束关系。
- An orientation of a complete graph is called a tournament.完全图的定向图称为竞赛图。
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