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