To study the offense-defense confrontation process of joint stand-off missile weapon systems, the computing simulation method is used.

本文从这四个阶段给出了对抗过程中武器系统生存能力的动态描述，并分析了各个阶段的计算模型。

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Israel is alarmed by Iran's recent test firing of its longest-range missile and previous threats by its president to wipe the Jewish state "off the map."

VOA: standard.2009.12.28

Japan simply wants to fend off missile threats to its territory.

ECONOMIST: Mr Kim, meet Mr Kim

Meanwhile, American officials have been exploring with the Russians and others whether a deal might be done to head off further missile sales.

ECONOMIST: North Korea and America: Not yet at ease | The

If warding off the missile threat were only a matter of building shields and hunkering down under them, the problem might seem a fairly simple one.

ECONOMIST: An American shield for Asia?