steppen.(特指西伯利亚一带没有树木的)大草原；干草原stepped curve阶梯形曲线stepped screw台阶螺钉stepper motorn.步进电动机；步进电机；步进马达stepped sprue[机] 分级进模口stepped ageing阶段时效stepper switch步进开关, 分档开关stepped piston级形活塞,差动活塞Steppe lemming草原兔尾鼠(鼠科)stepped string明楼梯梁stepped insidev.进入