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 layer potential单层势single domain particle单畴颗粒single segment process单段处理single-track running单线行车single compressor uint单机机组Single embryo transfer单胚胎移植single ion aceelerator单离子柬加速器Single-hole blasting单孔爆破single sideband system单边带系统single-action clutch单作用离合器

1. A light tackle having double or single blocks, used to hoist or tighten rigging.
   轻型滑车双滑轮或单滑轮轻型滑车，用于升起或拉紧支撑船桅和帆的全部绳索
2. The organizations were formed because of people's belief that the city is just too large to care about any single block.
   人们认为这个城市太大难以管理到每一条街道，所以成立了这样的组织。