某些固体物质的不规则表面是分形结构。
The heterogeneous surfaces of some solid materials (graphite, charcoal. Faujsite. etc)are fractals.
填充材料的使用是特别有利的，如果标本有不规则表面的高度。
Use of filler material is especially advantageous if the specimens have a high degree of surface irregularities.
他的成熟风格由此成形：高挑细瘦的人体，凿痕累累的不规则表面。
Thus he arrived at his mature style, which consisted of tall, attenuated figures with irregular, rough-hewn surfaces.
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