But as the year moved on Revelations that Iran had been deceiving the rest of the world about its nuclear experiments put an end to any hope of U. S. -iran rapprochement.

但是这一年中，随着时间的推移，伊朗一直向全球其它国家隐瞒其核试验一事终被曝光，这使恢复美伊关系的希望成为泡影。

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It says that Iran created computer models of nuclear explosions in 2008 and 2009 and conducted experiments on nuclear triggers.

附件称伊朗于2008年和2009年建造了核爆炸的电脑模型，并进行了核引爆实验。

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Forward modeling is used to determine the general response of most electromagnetic logging measurements, unlike nuclear measurements whose response is determined mainly in laboratory experiments.

正演模型用来确定电磁测井测量的基本响应，和主要由实验室确定响应的核磁共振测量不同。

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The diplomat said that the Iranians have paved over a large part of the area surrounding a building where the IAEA suspects the Iranians were conducting nuclear experiments.

CNN: Story highlights

The U.S. believes sub-critical experiments are permitted but hydro-nuclear tests are not.

CENTERFORSECURITYPOLICY: Center for Security Policy | Politics and the Test Ban Treaty, By George F. Will, Newsweek, 20 October 1999

That is, the assessments must be grounded on existing nuclear test data, nonnuclear tests, fundamental science experiments, and simulations using validated computer models.

CENTERFORSECURITYPOLICY: US Nuclear Stockpile