The calcite layer and aragonite layers are multi-scale structure , and a small quantity of organic matrix distributes mainly in their grain boundary.
贝壳中的方解石和文石层均呈多级超微结构，微量的有机质在晶界和晶内呈不连续分布。
From the viewpoint of multi-grain structure of material, a polycrystal model is founded based on the crystal plasticity theory.
从材料的多晶体结构角度，基于晶体塑性变形理论建立了多晶体模型。
From the viewpoint of multi-grain structure of material, a polycrystal model is founded based on the crystal plasticity theory.
从材料的多晶体结构角度，基于晶体塑性变形理论建立了多晶体模型。
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