人们这么指是因为玻璃和很多矿物质不同，它并不形成晶体，而是由构成分子随意混在一起组成，就像在液体中一样。

The reason people say this is that unlike many minerals glass isn't formed into crystals but made up of its constituent molecules all jumbled together at random as they would be in a liquid.

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阐述了不同产地硅砂搭配使用过程中，硅砂成分及粒度组成对玻璃质量的影响，提出了硅砂最优化搭配方案。

This paper describes the effect of composition and granularity of silica sand on glass quality. Brings forward optimal mix proportion of silica sand from various ore-fields.

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釉砂和玻砂是古玻璃的前身，和古玻璃相比有着不同的成分组成和化学结构。

As the precursor of ancient glasses, faience and frit have different chemical compositions and structures from true ancient glasses.

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