By analysis of sand grain size in sediment microenvironment of modern rivers, the size and shape of grain and surface texture feature of quartz grain were described in this paper.

本文根据现代河流的已知沉积微环境中的砂样分析，阐述了河北平原河流沉积物的粒度成分、形态和石英颗粒的表面结构特征。

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The fracture of parallel to grain on air-dry wood texture show brittle fracture, and its surface texture with a fractal structure with random or statistical sense of self-similar.

气干木材的顺纹理断裂则表现出脆性断裂的行为，木材顺纹理断裂表面具有某种随机的或统计意义上的白相似结构而具有分形结构。

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