基原类群分布区的快速扩张可能是川乌药材道地性形成的主要遗传分化模式。

Range expansion of the original plants was likely the main genetic differentiation model for the formation of genuine character of Chuanwu.

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根据活性生物膜扩张原理，建立了硝化生物膜中微生物相互作用的非稳态解析数学模型，并可预测生物膜厚度的变化与微生物菌群的空间分布。

Based on the principle of active biofilm expansion , a non-steady state analytic mathematical model of microbial interactions in nitrifying biofilm was developed.

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最后确定了W及其泛中心扩张的自同构群的结构。

Finally, the structures of the automorphism groups of W and its universal central extension are characterized.

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