1·Notice that the gravitational potential energy increases.
注意，这里，重力势能是增加的。
2·And how about potential energy? It is not bound.
那么什么是势能，答案不是一定的。
3·Let me first give you the formal definition of gravitational potential energy.
我先给你一个对于，重力势能的形式定义。
4·It means that we better get away from these deterministic models where we have a little electron here with its potential energy and its kinetic energy.
它的意思是我们最好远离，这些确定性模型，那里有一个小电子，它具有势能和动能。
5·The spontaneous change lowers the potential energy in that case.
在这个例子中,自发变化减小了势能。