Then there is the suspected uranium-enrichment project: tricky to inspect, since the Americans are not even sure where it might be.

更甚，还可能存在一个颇受怀疑的铀浓缩计划：由于难以分辨察觉出来，甚至连美方本身都不确信是否真的存在。

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Iran denies this and, despite increasingly severe economic sanctions, has shown no sign that it intends to scale back its project or halt its contested uranium enrichment drive.

MSN: Analysis: Netanyahu risks overplaying hand in Iran dispute - Business - Stocks & economy | NBC News

The project is aimed at encouraging countries like Iran not to pursue their own uranium enrichment technologies.

BBC: Banking on nuclear peace in Kazakhstan

America fears that even with safeguards on the reactor itself, the project is a cover for Iran to seek other help especially uranium-enrichment technology for its covert nuclear-weapons programme.

ECONOMIST: New challenges for Americans, Europeans and Russians