形容詞 preemptive:

1. designed or having the power to deter or prevent an anticipated situation or occurrence
   同義詞：pre-emptive

1. I say this jump is preemptive.
   我說(shuō)這樣跳是先發(fā)制人的。

preemptive 或 pre-emp.tive

adj.（形容詞）
Of, relating to, or characteristic of preemption.
先買（占）的：先買（占）的、關(guān)于先買（占）的或以先買（占）為特點(diǎn)的
Having or granted by the right of preemption.
有先買（占）權(quán)的或被授于先買（占）權(quán)的

Relating to or constituting a military strike made so as to gain the advantage when an enemy strike is believed to be imminent:
先發(fā)制人的：關(guān)于或構(gòu)成為了勝過(guò)將臨的敵方攻擊而進(jìn)行的軍事打擊的：
例句：
a preemptive nuclear attack.
先發(fā)制人的核襲擊

Undertaken or initiated to deter or prevent an anticipated, usually unpleasant situation or occurrence:
先發(fā)制人的：為延緩或阻止預(yù)期的，經(jīng)常是不愉快的狀況或事件而做出的或先做的：
例句：
The two companies organized a preemptive alliance against a possible takeover by another firm.
這兩個(gè)公司組成了先發(fā)制人的同盟以防備可能被另一個(gè)公司接管

Having or marked by the power to preempt or take precedence:
優(yōu)先的：有先占或優(yōu)先權(quán)的或以先占或優(yōu)先為特點(diǎn)的：
例句：
a preemptive business offer; preemptive authority.
優(yōu)先出賣；先買權(quán)

Games Relating to or being a bid in bridge that is unnecessarily high and is intended to prevent the opposing players from bidding.
【游戲】 先發(fā)制人的，盡量叫大牌的：橋牌叫出高得沒(méi)有必要的牌以阻止對(duì)手叫牌

【引伸】
preemp.tively
adv.（副詞）