stepra继代
stepn.步骤;台阶;舞步;步伐v.踏;以步测量
step-plyconveyor belting阶层式输送带
stepwise regression method逐步回归方法
step motion electric drive步进电气传动
step over to the corner.走向角落
step-accelerating method步长加速法
step hydro-power station梯级电站
step-by-step apparatus步进制机键
stepwise line fluorescence分段线荧光
step-by-step operation按位操作,步进操作
step-and-repeat camera分步重复照相机