additional Al添加剂additionn.增加；加法；附加物additional neccessary condition[计] 附加的必要条件additional impulse click spring附加冲击棘爪簧addition of the day-indicator周历环附加装置addition-elimination reaction加成反应additional background radiation附加的背景辐射addition liquid silicone rubber加成型液体硅橡胶additional conveyor jam control附加的传送带抑制控制additional commitment authority追加的承诺权Addition of Medical Electronics电子医疗设备的增加补充addition and betterment reserve扩建及改良准备