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