stepra继代stepn.步骤；台阶；舞步；步伐v.踏；以步测量step-by-step simulation步进模拟,逐步模拟step-by-step refinement逐步求精法step by step central office步进制电话局step-by-step refirement[计] 逐步求精法step-up pulse transformer升压脉冲变压器stepless voltage regulation无级调压Step and Repeat Image Order设置重复排版次序step and repeat photography步进重复照相术step-by-step generation逐步生成step out of narrow confines走出狭隘的圈子