pre-emptive

pre-emptive
adjective
  1. serving or intended to pre-empt or forestall something, especially to prevent attack by disabling the enemy
    抢先的,先发制人的
    pre-emptive action.
    先发制人的行动。
    a pre-emptive strike.
    先发制人的打击。
    ■relating to the purchase of goods or shares by one person or party before the opportunity is offered to others
    优先购买的
    pre-emptive rights.
    优先购买权。
    ■(Bridge)denoting a bid, typically an opening bid, intended to be so high that it prevents or interferes with effective bidding by the opponents
    (桥牌)(尤指开叫)阻击性开叫的
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