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