SDNn.交换数字网络；同步数字传输网SDabbr.南达科塔(=South Dakota)Sdudy on development of illite伊利石开发利用初探SDWT Summer dead weight tonnage夏季吃水载重SDA Comparison of Means Program均值比较SDK content and tools updated.更新了SDK的内容和工具。Sdudy on Platoon Dispersion Model车队离散模型研究SDML Small Device Markup Language小型设备标示语言sdudies of sustainable development可持续发展研究SDLC synchronous data link control同步数据链控制器SDMS Spatial Data Management System空间数据管理系统SDMA Space Division Multiple Access空分多址接入