Service Request Tracking System服务请求跟踪系统 Synchronous Residual Time Stamp (ATM Forum)剩余的时间同步邮票(ATM论坛) Safe Routes to School (also seen as SR2S)安全的路线去学校(也看成是SR2S) Strategic Reconnaissance Training Squadron战略侦察训练空军中队 Short Range Thermal Sight短距热的景象 Scaled Range Target System攀登范围指标体系 Spectacle Request Transmission System景观要求传动系统 Short-Tailed Shearwater (bird species)Short-Tailed Shearwater(鸟类) Secondary Request to Send (ITU-T)次要的要求发送(讨论) Synchronous Residual Time Stamp剩余的时间同步的邮票 simple reaction time to sound单纯对声反应时间