steppa干草原stepn.步骤；台阶；舞步；步伐v.踏；以步测量step-by-step automatic system步进自动制step-by-step style innovation渐进式改革step-by-step autometic system[电] 步进自动系统steps or distance recording watch记步记距两用表Stepping up Clean Coal Technology加快发展洁净煤技术Stepping between Text and Culture行走在文本与文化之间step-up and step-down voltage升降压stepwise adsorption/ desorption多级吸附／脱附step on soil after solid-cutting插后土壤踩实step-and-scan photolithography步进扫描光刻机