To see why entropy is useful for explaining spontaneous processes, like hot objects cooling down, we need to look at a dynamic system where the energy moves.

为了理解为什么熵的概念 可以解释自然发生的过程，比如说热的物体会冷却，我们需要理解能量流动的动态系统。

So what does the Second Law of Thermodynamics mean when it says: " Any spontaneous process increases the disorder of the universe."

那么当热力学第二定律说：“任何自发过程都会增加宇宙的无序性”时，它是什么意思？