Superior Mesenteric Artery肠系膜上动脉 Spinal Muscular Atrophy脊髓性肌萎缩 Software Maintenance Agreement软件维护协议 Singapore-MIT Alliance联盟会 Spectrum Management Agency频谱管理机构 Share Memory Architecture共享内存结构 Ship Maintenance Authority船舶维修局 Sales and Marketing Association销售和营销协会 Spectrum Manufacturers Association频谱制造商协会 Systems Management Association系统管理协会 special miscellaneous account特别杂项账户 Safety and Mission Assurance (NASA)美国国家航空和宇宙航行局的安全保证,任务 Saudi Medical Association沙特医学协会 Supplementary Motor Area辅助运动区 Stairway Manufacturers' Association楼梯制造商协会