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The isotopic abundance ratio and content are determined with isotopic mass - spectrometry.
文章用同位素质谱法测定了辐照堆元件铀的同位素丰度比和含量.
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Eight equations computed isotopic abundance and two equations computed isotopic abundance ratio have been given.
给出八个计算丰度公式和两个计算同位素比公式.
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