direct add直接相加指令directadj.直接的；笔直的；坦白的v.对准；指挥；指示；命令direct deep black EW直接深黑EWdirect-heated mold直接加热压模direct acyclic graph有向无环图Direct Exchange Item直接交换项目directrix of a conic二次曲线的准线direct transfer flap直接转移瓣direct comprehension直接理解direct drying method直接干燥法direct-meltprocess池窑生产direct participation直接参与