Plutonium can be extracted from nuclear wastes and expensively reused in special sorts of fuel, but it can also be fashioned into the fissile core of a weapon.

钚可以从核废料提取，并可作为某种昂贵燃料重新加以利用。然而钚也可以加工成武器中用于核裂变的核心部件。

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Yet it is openly working on missiles that could deliver one and on the techniques that could produce sufficiently enriched uranium or else plutonium for a weapon's fissile core.

ECONOMIST: Proliferation from North Korea and Iran