All the more important, then, to keep a close eye on plants that produce quantities of such dangerous materials-especially where uranium is enriched and plutonium is extracted from spent fuel.

然后，更重要的是要密切监视生产这种危险燃料的核工厂，特别是进行铀浓缩和从废料中分离钚的那些地方。

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Japan's reactors are almost all fueled by enriched uranium, not plutonium-based fuel.

WSJ: U.S. Opposes Japan's Nuclear Plan