jump-off

动词 jump-off:

1. set off quickly, usually with success
   同义词：jump off
2. jump down from an elevated point
   同义词：jump, leap, jump off

jump-off

n.（名词）
The commencement of a race or of a planned military attack.
开始，出击：比赛的开始，或有计划的军事进攻的开始
A jumping contest at a horse show, especially a final or tie-breaking round.
平分决胜：马匹展览会上的骑马跨越障碍比赛，尤指最后一轮或平分决胜局