sm
abbr. (=master of science, sergeant major, service mark, stage manager, stationmaster, small) 理学学士, 士兵勋章, 舞台策划, 小的
abbr.
1. =secondary memory 辅助存储器, 辅助内存
2. =service module (宇宙飞船的)服务舱, 供应舱
3. =servomechanism
4. =strategic missile (地对地)战略导弹