ADJ [usually ADJ n]先发制人的;抢先的 A pre-emptive attack or strike is intended to weaken or damage an enemy or opponent, for example by destroying their weapons before they can do any harm. 先发制人的;抢先的
...plans for a pre-emptive strike against countries that may have biological weapons.
先发制人打击可能拥有生物武器的国家的计划
In a pre-emptive move the Interior Ministry arrested a number of suspected dissidents.