Request for Feature请求特征 Request for Feedback请求反馈 Resources For the Future未来资源 Raised Face Flange光滑式密封面法兰 RÉseau FerrÉ de FranceRÉseau FerrÉ de France Reseau Ferre de France (French: Network Bottle Pincers of France)网格Ferre法国:网络瓶子夹钳法 Reason for Failure失败的原因 Ready For Ferry准备渡轮 Radio Frequency Finder无线电频率 Request For Forces请求的力量 Refugee Film Festival (UNHCR)联合国难民电影节 Request For Flight请求飞行 Right Foot Forward (Tae Kwan Do)右脚向前(跆拳道) Rescue Firefighter救援消防队员 Roger Federer Foundation费德勒的基础