Stepen施特彭stepn.步骤；台阶；舞步；步伐v.踏；以步测量stepping reflex跨步反射step forward.向前迈步step back relay跳返继电器step index word[计] 步进变址字stepless timing无级调速stephead piston级式顶活塞step multiplier步进式乘法器,阶梯式乘法器stepping suture阶梯状缝合[法]step fault zone多级断阶带stepout-relay失步继电器