The lead isotopic composition of the Devonian stratabound ore deposits in the Nanling region is highly variable and belongs mostly to the "mixing type".
我国南岭地区泥盆系层控矿床的铅同位素组成变化很大，大多属混合型铅。
In the model, isotopic exchange probability is variable and other parameters come from reference or experiment.
模型中的气-固相同位素交换几率为可变参数，其余参数使用了文献值或实验值。
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