If there's wood, we will use wood but the very special African woods with a very fine structure.

如果有木，我们使用木，用非常特殊的非洲木，非常精细。

The sponges don't need high temperatures to generate these fine structures.

海绵不需要高温来产生这精细。

It is a man-made composite material that changes the conventional properties of light and electromagnetic waves by designing and reorganizing the fine structure of the material.

它是一种人造复合料，通过设计和重组料的精细，变光和电磁波的传统特性。

But not just any old pure carbon, pure carbon with a very fine microscopic lattice-like structure that actually turns out to be absolutely essential to the functioning of gunpowder.

不仅仅是任何旧的纯碳，具有非常精细的微观晶格状的纯碳实际上对火药的功能是绝对必要的。