single hop单段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-pass conversion单程转化single channel recording单通道记录single-point grounding单点接地single filling flat duck双经单纬帆布single engined aeroplane[机] 单发动机飞机single-stage digestion单级消化single-in let impeller单吸叶轮single longitudinal mode单纵模single-photon detector单光子探测器single cylinder mud pump单缸泥浆泵

1. All single boards have indicating lamps to display their running status.
   各单板都有显示其运行状态的指示灯。
2. These products include single board computers, communications and networking modules, and complete systems.
   这些产品包括单板电脑，通讯和网络模块，以及完整的系统。