由于与美国相比，俄罗斯更倚重于多弹头分导再入飞行设备，俄罗斯不得不建造相当数量的单弹头导弹来重新获得与美国的势均力敌，而他们没有钱来做到这点。
Since Russia relied more heavily than the United States on MIRVs, the Russians would have to build a considerable number of single-warhead missiles to regain parity, and they couldn’t afford to do it.
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