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 and reverse bulging正反向胀形direct current transformer直龄压器直隶感器direct current consumption直流电耗direct current servosystem直流伺服系统directed discussion method导向讨论法direct current compensator直凉偿机direct-acting transducer直接作用传感器direct - vision teaching直观教学direct current key pulsing直流按键脉冲direct vision spectroscope直视棱镜分光镜,直视分光镜