動(dòng)詞 jump-off:

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

jump-off

n.（名詞）
The commencement of a race or of a planned military attack.
開(kāi)始，出擊：比賽的開(kāi)始，或有計(jì)劃的軍事進(jìn)攻的開(kāi)始
A jumping contest at a horse show, especially a final or tie-breaking round.
平分決勝：馬匹展覽會(huì)上的騎馬跨越障礙比賽，尤指最后一輪或平分決勝局