direct jet直射式directadj.直接的；笔直的；坦白的v.对准；指挥；指示；命令direct circular transformation直接圆变换direct-reading potentiometer直读式电位计direct recording magnetic tape[电] 直接记录磁带direct to-ground capacitance对地电容directed communication network有向通信网direct-indirect illumination漫射光照明direct material usage variance[经] 直接材料用量差异Direct Aircraft System Trainer数字式飞机系统教练器direct television broadcasting直播电视, 直接电视广播direct international telegraph直达国际电报