相反方向的

North and south are opposite directions.

北和南是相反的方向。

I've just had an inspiration; why don't we try turning it the other way!

我突然想出个好主意—我们为什么不试着向相反的方向呢！

A semicomplete multipartite digraph is obtained by replacing each edge of a complete multipartite graph by an arc or by a pair of two mutually opposite arcs.

摘要 用条对方向相反的完全多部无向图的每条边所得到的有向图被称为是半完全多部有向图。