directed tree oriented tree
directed tree
有向直线用英文怎么说
有向线段用英文怎么说
有向边用英文怎么说
有向集用英文怎么说
有向非循环图用英文怎么说
英语词典收录了最新的汉英词典和英汉词典，总共有200多万个词条，词库仍在不断更新中。
