将土-水-气三相耦合，提出了一种确定降雨入渗后的暂态渗流场的模型。

A model for confirming this infiltration field is presented by soil, water and atmosphere three-phase coupling.

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土壤是固、液、气三相共存体，氟在土-水-植物、动物界面的转化可通过土壤水溶性氟含量表征。

Fluorine transformation in soil-water-plant and animal system can be represented by soil soluble fluorine content.

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本文将土体视作三相介质，对准饱和土中波的传播特性做了深入的研究。

Taking soils as three-phase medium, a study on wave propagation in nearly saturated soils is presented in this dissertation.

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