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".

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。

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I hope I have conveyed something of the overlapping character of what I call the four phases of focusing.

我希望我已经说明了聚焦四步骤是相互重叠的。

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Phased-mission-system (PMS) is a typical kind of complex system, which consists of consecutive and non-overlapping time periods phases, it includes the most combat processes of arm systems.

多阶段任务系统(PMS)是一种典型的复杂系统，它包括多个在时间上连续且无相互重叠的基本任务，武器系统的作战过程多数属于这种复杂系统。

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