基本解释adj.优先购买的；先发制人的同根派生 英汉例句用作形容词 (adj.)A preemptive neutralization drill has stirred up the members of the Red Revolutionary terrorist Unit!先发制人的中立训练激起红色革命恐怖分子的叛乱！I say this jump was preemptive.我说这样跳叫是先发制人的。