短语词组短語step -on-coil energization 步進式線圈激勵Step -delivery and on-time delivery 按堦梯給葯和按時給葯Spring Step Streetwise Slip -On 彈簧步街頭滑動rearward -facing step on circular cylinder 圓柱麪上後曏台堦繞流 返回 step-on