说明：  基于Direct3D虚拟三维技术开发的三维场景模拟系统3DSSS的基本功能、特点、开发中的关键技术以及完整的模拟过程
(Direct3D-based virtual 3D technology development of 3D scene simulation system of basic skills 3DSSS and characteristics of the development of key technologies and integrity of the simulation process)