Addyn.阿迪addv.加；增加；补充adduetion synergism加合增效add conference code加入会议码add-or-subtractn.加或减add instructiontime加法指令时间additivity of value价值的可加性add oil to the fire火上加油； 使争吵更激烈additivity of means平均数可加性add toner indicator加粉指示器, 加色调指示器addtional DC source外加直流电源add up depreciation累计折旧