singlepoleadj.单极的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 operator单一操纵器single step run单步运行single-bridge单相桥single chain Fv单链抗体single-scroll单螺旋single oil area纯油区single bar feed单杆送料single gap head单隙磁头singles skating单人滑single passport单程护照

1. The bridge crosses the river in a single span.
   河上那座桥是单跨桥。