discrete map离散映射discreteadj.不连续的；分离的discrete searching aids离散式检索工具Discrete-event system离散事件系统discrete charge storage分立电荷存储discrete optimum design离散优化discrete sine transform离散余弦变换discrete distance field离散距离场discrete surface patches离散曲面片discrete time simulation离散时间仿真discrete bilinear system不连续双线系统discrete cross-section离散断面