During the day, energy is stored by heating up large tanks of molten salt composed of a mixture of 60 percent potassiumnitrate and 40 percent sodium nitrate.
白天，能量通过加热庞大容器里的熔融盐保存起来，熔融盐由60%的硝酸钾和40%的硝酸钠组成。
2
I let the silver nitrate react with pieces of brain hardened in potassium dichromate.
我让已被重铬酸钾硬化的一些脑组织细胞与硝酸银反应。
3
The method, now known as Golgi staining or Golgi impregnation, involves hardening of tissue in potassium bichromate and ammonia, followed by immersion in a silver nitrate solution.