These designs reduce the problems of weapons-grade material being produced and sold illicitly .

这些设计也减少了制造终极武器的材料和非法利用核能的问题。

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Fearful that India's nuclear Arsenal will overwhelm its own, Pakistan continues to block negotiations on a treaty that would freeze all production of weapons-grade material.

巴基斯坦担心印度的核武库会压过其核武库，所以继续阻挠关于冻结所有武器级材料生产的条约的谈判。

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It says U.S.-sponsored security upgrades have been completed for 75% of the buildings that contain weapons-grade material and for about 65% of Russia's nuclear warhead sites.

据称由美国发起的安全提升已经摧毁百分之七十五的包含武器原料的建筑物和百分之六十五的俄罗斯核弹头基地。

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"Last November,Iran announced that it would build In February, Iran said that it would begin to enrich uranium to nearly 20 percent-moving,closer to weapons-grade material."

VOA: standard.2010.06.09

The U.S.government says Tehran is trying to make weapons-grade nuclear material.

VOA: standard.2010.06.29

One reason why many people distrust nuclear power is because they believe it is impossible to separate civil reactors from weapons-grade fissile material.

BBC: Sellafield saved - for now

The U.S. and its allies are seeking to gain Iran's willingness to suspend its production of near weapons-grade nuclear material at its uranium-enrichment sites in return for economic incentives.

WSJ: Iran Says It Is Set for Nuclear Talks, but West Is Skeptical

While most are enriching below 20 percent, this material, too could be turned into weapons-grade uranium, although with greater effort than is the case for the 20-percent stockpile.

NPR: Iran Nuke Talks Open, EU Asks Tehran To Compromise