The heterogeneous surfaces of some solid materials (graphite, charcoal. Faujsite. etc)are fractals.

某些固体物质的不规则表面是分形结构。

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Inside and outside rounds of piston rings are heterogeneous surfaces, which require high precision in size.

活塞环的内外圆都是异形表面，且尺寸精度要求高。

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The result suggested that stratospheric heterogeneous processes on aerosol surfaces is important for the relation between aerosols and trace gases in the aerosol-enriched layers.

结果表明：在气溶胶含量较高的气层内，气溶胶表面的非均相反应对气溶胶与微量气体的关系有重要影响。

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