During the day, energy is stored by heating up large tanks of molten salt composed of a mixture of 60 percent potassium nitrate 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
Magma occurs deep within the earth and is made up of a mixture of molten mineral materials.
岩浆是形成在地球的深部，它是熔融的物质的混合物。
3
Steel made by the mixture of molten wrought iron, charcoal, and other substances in a crucible.