single tee三通管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-liquid phase双液相single singal ranging单信号测距single-helical gear单螺旋齿轮single apertured core单孔铁心single-female group单雌性组single-wire circuit单线电路single tier equipment单排话传电报交换台single-stage blower单级鼓风机single-copy protein单拷贝蛋白质single-polarization单一偏振