single mom单身母亲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 thinning shears单口梳发绞剪single head screw pump单头螺杆泵single-sludge system单泥系统single action pressing单动压制single channel antenna单波道天线single-pressure HGSRsingle cylinder diesel单缸柴油机single-ended tension单端张拉single-lined diagram单线接线图single surface aerator单个表曝机