理学 [重名条] 释 directed graph 有向图 二元组，其中顶点集非空，有向边集（或弧集）是由的有序对构成的子集。
＞组合数学、组合设计与图论＞图论＞释义 directed graph; digraph 有向图 directed graph 有向图†
理论计算机科学 数据结构 释文 directed graph 有向图
- [18F]- deoxy glucose
- 18F-FDG
- 18F-florbetaben
- 18F-florbetapir
- [18F]-fluorodeoxyglucose
- [18F]-fluorodeoxyglucose ([18F]-FDG)
- [18F]flutemetamol
- 18F-FMISO
- [18F]-sodium fluoride
- [18F]-氟代脱氧葡萄糖
- [18F]氟代脱氧葡萄糖
- [18F]氟化钠
- [18F]氟比他班
- [18F]氟美他酚
- [18F]艾米维德
- 1,8-naphthyridine
- 18-point problem
- 18th International Genetics Congress，IGC
- 18-valence electron rule
- 18-valence electron rule; 18-VE rule
- 18-VE rule
- 18-价电子规则
- 18价电子规则
- 18点问题
- 18电子规则