pre-emption

n [U] 1 (fml 文) (a) purchase by one person, group, etc before others have the chance to buy 优先购买. (b) right to do this 优先购买权. 2 obtaining or preventing (sth) by acting in advance 抢先行动以占有或阻止（某事物）.

prattler, prawn, pray, prayer, prayer-book, prayer-mat (also `prayer-rug), prayer-meeting, prayer-wheel, praying mantis, pre-, pre-arrange, pre-arranged, pre-arrangement, pre-cast, pre-condition, pre-conditioning, pre-eminence, pre-eminent, pre-eminently, pre-empt, pre-emptive, pre-exist, pre-existence, pre-existent, pre-heat, pre-natal, pre-ordain, pre-package, Pre-Raphaelite, pre-record, pre-recorded, pre-school, pre-set, pre-shrunk, pre-stressed, pre-tax, pre-war, preach, preacher, preachy,