first strike
noun [ C ] uk/ˌfɜːst ˈstraɪk/ us/ˌfɝːst ˈstraɪk/
（核战争中旨在摧毁敌人发射能力的）第一次攻击，先发制人
in a nuclear war, an attack intended to destroy the enemy's ability to fire before they have had an opportunity to do so
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