stepra继代stepn.步骤；台阶；舞步；步伐v.踏；以步测量Step by Step Rolling Mill步进轧机step type multimode fibre阶跃型多模纤维step-and-repeat camer分部重复照相机Step and spiral-orifice阶梯螺旋孔口step-wedge penetrameter[医] 楔形梯级式透度计step and repeat equipment步进重复装置step-by-step selector步进式选择器Stephanotis flor/bunda非洲茉莉Step-by-step strategy分步实施步骤stepwise regressive method逐步回归法