Undergraduate Study Education Program (NASA)本科学习教育计划(NASA) Urban Systems Engineering (degree programs)城市系统工程学位 Ubiquitous Systems Evaluation (workshop)随处可见的系统评价(车间) Unified Stochastic Engine统一的随机的引擎 Underground Service Entrance Cable地下服务入口电缆 United States of Earth美国的大地发出的渴望的声音 Univac Scientific ExchangeUnivac科技交流 User-to-user Signaling EntityUser-to-user信号的实体 Unconditionally Stable Extended无条件稳定扩展 User Support Environment用户支持的环境 Used Solvent Elimination用溶剂的消除 United States of Europe (possible name for politically united future European Union)美国的欧洲(可能名称为政治联合未来欧盟) Ultrasonic Scanning Equipment超声波扫描设备 Log filen. 日志文件 ultrasonic examination超声波检查