Kilby built his ICs out of germanium, a rare and unstable material.

Kilby 用锗制造了他的 IC，这是一种稀有且不稳定的材料。

Less material usually means a smaller, lighter weapon, but there are ways to organize metals and other unstable materials to make the reactions extremely powerful.

更少的材料通常意味着更小、更轻的武器，但有一些方法可以组织金属和其他不稳定的材料， 使反应非常强大。