Research and Developmentn. (产品等的)研究与开发 Registry of EPA Applications and Databases环保署登记的应用软件和数据库 Readinessn. 准备就绪, 预备, 敏捷 Radar Echo Augmentation Device雷达回波信号增强装置 Read, Enjoy, and Discover阅读,喜欢和发现 Reading Education Assistance Dogs阅读教育援助的狗 Real-Time Electronic Access and Display电子访问和显示。实时 Renew Empower Action and Determination更新授权行为和决心 Read Educate And Develop阅读教育和发展 Regional Economies Assessment Database区域经济评价的数据库 Reading Education For Adult Development成人教育的发展具有重要意义。阅读 Reading Enrichment And Development读书充实和发展 Read Enjoy And Discover阅读享受和发现 Readers Enjoy Authors Dreams读者喜欢作者的梦想 Rapid Engineering Application Development快速的工程应用的发展