希拉里·克林顿，美国国务卿，最近告知国会说，巴基斯坦已经将核弹头分散于不同地区以增强其安全度。
Hillary Clinton, the US secretary of state, told Congress recently that Pakistan had dispersed its nuclear warheads to different locations across the country in order to improve their security.
但是曾几何时，回收的前苏联核弹头占据了美国低浓缩铀的大部分市场。
But at times, recycled Soviet bomb cores have made up the majority of the American market for low-enriched uranium fuel.
世界上拥有数千枚核弹头的国家只有两个：美国和俄罗斯。
Only two countries on Earth possess thousands of nuclear warheads: the United States and Russia.
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