But Iran's response to Brazil's offer to serve as a neutral repository for Iran's stocks of enriched fuel as part of an attempt to revive a mooted solution to the nuclear stalemate has been vague.

但伊朗就巴西愿意担任伊朗储备的浓缩燃料的中立存储库的回应还是模糊不清的，虽然这作为一种有争议的尝试可以重启已陷入僵局的核谈判。

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Under it, Iran would give up most of its uranium stockpile in return for enriched fuel for a medical reactor.

根据这份合约，伊朗将放弃它的大多数储备铀以换取医用反应器的高浓度燃料。

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Under that arrangement, Russia is providing the enriched uranium fuel for the reactor.

根据有关安排，俄罗斯正在为这个核反应堆提供浓缩铀。

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On Monday,Iran formally notified the IAEA of its response to the nuclear-fuel swap deal, under which it would ship some low-enriched uranium to Turkey in return for higher grade fuel for a Tehran research reactor.

VOA: standard.2010.05.25

But experts say there is unlikely to be agreement on converting all nuclear power stations to use low-enriched fuel.

BBC: Obama in push for 'world without nuclear weapons'

We are continuing research on the feasibility of converting research reactors in the United States and Russia to low-enriched uranium fuel.

WHITEHOUSE: The White House

He cited the country's production of 20%-enriched fuel as material needed to make medicine for more than 1 million Iranian cancer patients.

CNN: Little headway in Iranian nuclear talks