stepra继代stepn.步骤；台阶；舞步；步伐v.踏；以步测量step-by-step teaching分步教学Stephanodiscus hantzschiin.冠盘藻stepping scanning circuit分级扫描电路stepwise regression model逐步回归step-decreasing voltage阶梯降压Stephania rotunda Lour.圆叶千金藤step up pulse transformer升压脉冲变压器Stephanoporos epiphyticusn.附生冠孔藻Stephanocodon irregularisn.不整齐环领藻stepless speed regulation无级调速