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本文将双重介质中核素迁移模型的解析解进行了简化，得到了便于应用的近似解析解及其相关结论；经推导给出了实验室利用近似解析解的条件以及求阻滞系数、固有扩散系数的公式。
In this paper, the analytic solution of the radionuclide migration model in the dual medium is simplified, and the approximate analytic solution and its related conclusions are obtained. The analytical solution of the approximate analytic solution in the laboratory is derived and the coefficients of retardation, The formula for the coefficient.