Stepka斯乔普卡stepn.步骤；台阶；舞步；步伐v.踏；以步测量step down from plane走下飞机step-up instrument无零点的仪表step into sb's shoes接替某人的位置step-up substation升压变电所step digital control步进数字式控制step into the breachph.step-lap laminated阶梯接缝step-down rectifier降压整流step by step exchange步进式电话交换局step response diagram阶跃响应图