directableadj.可指引的；可指挥的；可操纵的directadj.直接的；笔直的；坦白的v.对准；指挥；指示；命令direct air- cooling unit直接空冷机组direct plummet observation正锤线观测direct-coupled generator直连式发电机,直连励磁机direct peroxidase staining直接过氧化物酶染色法direct digital measurement直接数字化测量direct charge-off method直接冲销法direct air-cooling units直冷机组Direct consume of material直接材料directed ordered semigroup有向序半群direct-current converter直流变换器