Energy means, you know, chemical reactions happen, and you end up with something that might be exothermic, that is, the products are more stable then the reactants.

能量表明，当反应发生之后，你最终会得到放热的产物，换句话说就是产物比反应物更稳定。

麻省理工公开课 - 热力学与动力学课程节选