directed graph (digraph)造句

例句与造句

1. The theory of graphs can be roughly partitioned into two branches : the areas of undirected graphs and directed graphs ( digraphs )
   图论大致可分为两个方向：无向图与有向图。
2. It's difficult to find directed graph (digraph) in a sentence. 用directed graph (digraph)造句挺难的