Stepka斯乔普卡stepn.步骤；台阶；舞步；步伐v.踏；以步测量step-by step motion步进step-up / ladder收益递增型/梯式产品Step-back technique逐步后退法stepwise distillation分段蒸馏step-recovery diode急变二极管stepping electromotor步进电机Stephania brachyandran.白线薯step power regulation有级调功step-up transformer升压变压器,升压器Stephanodiscus parvusn.微小冠盘藻