粒子如何堆积是一个重要的因素，它决定了未来胶囊中孔的尺寸和大小，进而影响胶囊的渗透性。

The way how the particles are packed is an important factor, as it determines the number and size of pores of the future capsule, and consequently the capsule permeability.

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它们直接由海水中硅质生物——放射虫和硅质海绵的遗体堆积而成，形成的决定因素是海水中硅质生物的含量与海水性质。

The contents of siliceous organisms in sea water and the propertiesof sea water were decisive factors for the formation of these siliceous rocks.

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作者认为各向异性微结构和临界堆积密度是影响双折射的两大关键因素。

Anisotropic microstructure and critical packing density are the two key factors to influence the in-plane birefringence.

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