singleadj.单一的；单个的；特指某人或某物；单身的；单人的；单程的n.单程票；单曲；单人房间；单身者；<美>一元纸币；(网球)单打比赛；(板球)一分打；(棒球)一垒打v.挑选(一个)single call单调用, 单呼

1. This paper gives the direct approaches for topological analysis and synthesis of hybrid single contact switching networks which contain both undirected and directed edges.
   本文给出既含无向边又含有向边混合单触点开关网络的拓扑分析与综合的直接方法。