外电报道如下:The doctrine of "preemptive war" -- attacking a potential enemy before the United States is attacked -- is now official US policy reserving and this has left Washington further at odds with some allies. Preemptive的意思是“先发制人的、抢先的”。例如:a preemptive offer for the property our competitors wanted to buy(对我们的竞争对手想购买的房地产抢先提出的报价)。The army launched a preemptive strike against the enemy.(军队对敌人发起了先发制人的攻击)。