steppa干草原stepn.步骤；台阶；舞步；步伐v.踏；以步测量Steps are described as follows操作步骤如下step-down rectifying circuit降压整流电路step-length searching method步长搜索法step-less speed-adjustment无级调速stepless friction transmission无级摩擦式传动step-by-step variable gear多级变速齿轮step-reaction polymerization[化] 逐步聚合; 逐步聚合反应Step- wadge calibration film阶梯楔块校准底片step- variable LMS algorithm变步长LMS算法Steps in the Selection Process选拔步骤