adj.无目标的；未受指导的；（信）无收件人姓名的
Criticism should have an aim; it shouldn't be undirected. 批评要有针对性，不要无的放矢。
A circ is an undirected graph having only vertices of even nonzero degree. 一广义圈是一无向图，其顶点次数都是非零偶数。
Aim To discuss the matching equivalence of the simple undirected graph. 摘要目的讨论简单无向图的匹配等价问题。
Undirected, however, it can wreak havoc in your day-to-day experience. 人类所做的每一件事情都只是想改变他们的感觉，想改变“心境”。
Four special capacity expansion problem of undirected network were discussed and the responsible strongly polynomial algorithm was get. 讨论了无向网络容量扩充的4种特殊问题，给出了相应的强多项式算法.
