keyern.电键器；调制器keyn.键；关键；钥匙；答案adj.关键的；主要的vt.键入；用钥匙锁上；为 ... 调音key speech frequency主要言语频率Key point of salvage救护要点key macroinstruction关键宏观命令Key disclosure delay公开延迟时间间隔key evaluation index基准指标keyed file structure键控文件结构key telephone system按键式电话系统key technical issues关键技术问题Key seating sticking键槽卡钻key-lifting switch扳键开关