single jet单喷口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 chain antibodies单链抗体single station forecast单站预报single-strain culture单菌株培养物single injection method单次注射法single-spar structure单梁结构single-polarity pulse单极性脉冲single-species system单种群single in-line module单列直插式模块single-access network单路访问网络single drawn horse mane单齐马鬃

1. Any gift, says the policy, must be consumable in a single day.
   政策规定，任何礼物只能是可单日消费的。