They reported the abnormal uranium content of waters issuing from tuffaceous rocks. 他們發(fā)現，從凝灰巖中流出的水中鈾含量反常。
The measurement methods of uranium concentrations in irradiated fuels by isotopic dilution mass spectrometry are described. 介紹了用同位素稀釋質(zhì)譜法測量輻照元件鈾含量的方法。
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