核俱乐部的门槛一天比一天低。
一些新的核俱乐部成员要比其他国家更受欢迎。
事实上，如今，核俱乐部在不断扩大，核武库也变得更加多样化且异常复杂，他在书中提出的问题甚至更重要了。
Indeed, now that the nuclear club has grown, and nuclear weaponry has become more versatile and sophisticated, the questions that his book raises are even more relevant.
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