根据有关安排，俄罗斯正在为这个核反应堆提供浓缩铀。
Under that arrangement, Russia is providing the enriched uranium fuel for the reactor.
科学家一直在寻找更简单的方法制造名为浓缩铀的昂贵材料- - - - - -核反应堆和炸弹的燃料，现在只在大型工厂生产。
Scientists have long sought easier ways to make the costly material known as enriched uranium - the fuel of nuclear reactors and bombs, now produced only in giant industrial plants.
内贾德这周提出接受西方的方案，并用低浓缩铀交换反应堆所用的燃料。
Ahmadinejad this week offered to take the West's deal and trade it for fuel for its reactor.
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