direct cut直接劈
directadj.直接的;笔直的;坦白的v.对准;指挥;指示;命令
directed line segment有向线段
direct trading system直接交易制度
direct shares holding直接持股
direct-axis circuit顺轴电路
Direct Reporting Unit直接报告装置
direct lateral thrust直接侧向力
direct cause of death直接死因
direct esterification直接酯化
direct current switch直流开关
direct heated cathode直热式阴极