si

SI Straight-In Approach (飞机) 直线进场

SI Secondary Injection 二次喷射

SI Superimpose vt. 重叠, 安装, 添加

SI System Integrators 系统集成商

SI Scintillation Index 起伏指数

SI Salt Institute 盐研究所

SI Specific Impulse (measure of efficiency of rocket engines) 具体措施的效率的脉冲(火箭发动机)

SI Strategic Investor 战略投资者

SI Sistema de Informação Sistema de Informação

SI Spokane International Railroad Company 斯国际铁路公司

SI Shrouded Isles (gaming, Dark Age of Camelot add-on) 黑暗笼罩群岛(游戏,年龄到附加)

SI Society for India (Cornell University) 社会对印度(康奈尔大学)

SI Strategic Initiative (management) 战略倡议(管理)

SI Supporting Installation 配套安装

SI Societatis Iesu, Latin for Society of Jesus, Jesuits (religious order) Societatis Iesu,拉丁语对于社会的耶稣,耶稣(宗教秩序)

SI Situationist International (governing body of political dissidents circa 1968) Situationist国际(管理机构持不同政见者大约1968)

SI Scalable Infrastructure 可扩展的基础设施

SI Scientific Investigation 科学调查

SI Smoothness Index 平整度指数

SI Solution Implementation 解决方案实施