Western powers are concerned that Iran is seeking to enrich uranium to a purity high enough to make nuclear weapons, which experts say is around 90 percent.
西方大国担心,伊朗在试图将铀浓缩到武器级别纯度。专家说,武器级别的铀纯度大约在90%。
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The purity of TMH was confirmed by 13C-Nuclear Magnetic Resonance (NMR) spectroscopy.