steppa干草原stepn.步骤；台阶；舞步；步伐v.踏；以步测量step-thrust in single chamber单室双推力step-by step B board dialling步进制B台拨接法stepless speed changing devices无级变速装置step-by-step control system步进控制系统Step into one more statement.单步执行多个语句。Stephanodrilus hteroglandularisn.异腺冠蛭蚓Stephania hernandifolia Walp.桐叶千金藤step-by-step testing method逐步测试法Step-by-step depressurizing逐级降压Steps of the Utilitarian Method效用主义的分析步骤