Office of Rail Regulation (UK government; formerly Office of the Rail Regulator)办公室的铁路条例(英国政府;从前办公室的轨道调节阀) Orchestra Revolutionn-aireet Romantique革命与浪漫乐队 Office of Response and Restoration (NOAA)办公室的反应和修复(NOAA) Operational Readiness Review操作准备审核 Overall Response Rate (medical treatment)整体反应率(医疗) Office of Refugee Resettlement (HHS)难民安置办公室(HHS) Operator Response Required操作员响应 Obligor Risk Rating债务人风险等级 Orroral Valley, Australia (GSTDN tracking station)Orroral山谷,澳大利亚(GSTDN跟踪站) Objective Response Rate客观的反应速度 Operational Readiness Report操作准备报告 Oak Ridge Reservation (Tennessee)田纳西橡树岭预定 Operational Replacement Radar操作置换的雷达 Office of Regulation Review (Australia)办公室的规定审查(澳大利亚) Off-The-Road Radial TireOff-The-Road子午线轮胎