stepra继代stepn.步骤；台阶；舞步；步伐v.踏；以步测量step into the job-market初涉职场Stephania brevipedunculatan.短梗地不容step height interferometer阶跃高度干涉仪STEP DRILLS WITH HEX SHANKStephanodiscus carconensisn.车轮冠盘藻step up the responsibility提高责任step-less speed variator无级变速stepless voltage regulator无级调压器stepwise subdivided method逐次分半法step and repeat projection步进重复投影