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-capacity system单容量系统single button mircophone单钮式传声器single debris flow gully单点泥石流灾害气象预报single base substitution单个碱基替代single donor transfusion单个供血者输血single-bevel T-joint单斜面T形接合single system accounting一贯制会计single-stage axial fan单级轴流风扇single molecular imaging单分子成像single form of ownership单一所有制结构