Stepko斯特普科stepn.步骤；台阶；舞步；步伐v.踏；以步测量step loading-unloading分级加卸载Stephania japonica Miers千金藤stepwise gradient device阶式梯度装置step index optical fibre阶跃折射率光纤step by step integration逐步积分法Stephanodrilus kawamurain.川村冠蛭蚓step feedback inhibition顺序反馈抑制stepwise image amplifier分级变焦影像放大器Step Kick to Foot Change踢踏步接换脚步Stephanodrilus anodontusn.无齿冠蛭蚓