不可渗透的粘土限制了水和黄腐酸的向下渗透，从而减少了化学风化和土壤灰化作用。
Impermeable clay limits downward percolation of water and fulvic acids, reducing chemical weathering and podzolization.
结果表明，涂料的活性化学物质渗透进入混凝土内部，与混凝土基体发生化学作用生成不溶针状晶体。
The results indicate that reactive ingredient of the paint penetrated into the internal part of concrete reacts with cement matrix to produce insoluble needle-like crystal.
碳酸盐岩次生渗透性是成岩作用、构造作用、水动力作用及生物化学作用的综合结果。
The secondary permeability of carbonate rocks is the result of comprehensive process of diagenesis, tectonics, hydrodynamics as well as of biochemistry.
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