美国导弹防御局（MDA）正在建造16个重叠的导弹防御系统，用以拦截基于“首先打击，经常打击”理念的来自于不同飞行阶段的导弹。
The MDA is developing some 16 overlapping systems, designed to hit missiles in different phases of flight on the philosophy of "shoot early, shoot often".
在军事上，又应集中力量，首先打击最反动的部分，中立那些不积极反动的部分。
Militarily, we should first and foremost concentrate our forces on striking at the most reactionary of the enemy's forces and cause the less reactionary forces to maintain a neutral stand.
应懂得利用顽固派的矛盾，决不可同时打击许多顽固派，应择其最反动者首先打击之。
We must know how to exploit the contradictions among the die-hards and must not take on too many of them at a single time, but must direct our blows at the most reactionary of them first.
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