universal key通用键,万能键universaladj.普遍的；全世界的；宇宙的；全体的；通用的n.通用原理，普遍原则universal dual-current通用双电流universal semantic signs通用语义符号universal warning system通用告警系统universal torsion tester万能扭力试验机universal rotating stage万能旋转台universal image recorder通用录像机universal prescriptivism普遍规定主义universal joint fork nut万向节叉螺母universal forgery attack无条件伪造攻击universal thread grinder万能螺纹磨床