n.抬高；将引擎加速，起转；事件的前奏曲，预备阶段；助跑 变形： 复数：run-ups 英英释义： run-up[ 'rʌnʌp ]n.a substantial increase over a relatively short period of time同义词：runupthe approach run during which an athlete gathers speedv.pile up (debts or scores)同义词：run upraise同义词：hoistrun upfasten