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2013-05-23 12:21
求翻译:In some kinds of environmental samples one can observe small differences in the isotopic ratios for a few elements caused by the continuous production of one of their socalled radiogenic isotopes by radioactive decay (in a geological time scale of 106 years) of accompanying radioactive isotopes of other elements. Chang是什么意思? 待解决
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In some kinds of environmental samples one can observe small differences in the isotopic ratios for a few elements caused by the continuous production of one of their socalled radiogenic isotopes by radioactive decay (in a geological time scale of 106 years) of accompanying radioactive isotopes of other elements. Chang
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