step up 英[step ʌp] 美[stɛp ʌp] [释义] 走上; (使) 增加; (使) 加快速度; 走上前去; [例句]M: As new orders keep pouring in, the workers are working three shifts to stepup production.M:随着新订单的不断增加,工人们已经采用三班倒来提高产量了。