However the synthetized composites have high porosity (20%-50%), which prohibits its use as structural material.

但是，该技术合成的复合材料一般含有较高的孔隙率(20% - 50%)，不能作为结构材料直接使用。

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The design was developed through custom computational protocols of structural formfinding, descriptive geometry, and stress flowdriven porosity.

这项设计通过自定义的计算协议结构塑形，画法几何和应力穿孔技术被开发出来。

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Therefore, helium porosity may be used as a structural parameter for low-porosity cementitious materials, but an incorrect conclusion may be drawn if mercury porosity is used.

因此，氦孔隙率可以作为低孔隙率胶凝材料的结构参数，而用压汞法可能会导致错误的结论。

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