Instead of using transistors made from pure silicon, those employed by these chips are made from silicon carbide, which is more robust.

这些芯片使用的晶体管由更坚固的碳化硅而非纯硅制成。

Not only is it pure silicon, it contains only one isotope of silicon, silicon-28, and that explains why the original material was so expensive.

这不仅是纯矽制造的，同时还只包括一种 矽的同位素：矽-28。这就是原材料那麽贵的原因。