And it's always going to come down to calculating the appropriate free energy, and how it changes in the process.

这总是涉及到计算,适当的自由能，以及这些自由能在过程中如何变化。

麻省理工公开课 - 热力学与动力学课程节选

When it breaks this bond, that chlorine atom, a free chlorine atom comes down and reacts, this is ozone, with the ozone in the upper atmosphere.

当它打破这个化学键，氯原子，一个自由的氯原子下来,和在大气层的上方的臭氧反应，这就是臭氧，在大气上层有臭氧。

麻省理工公开课 - 固态化学导论课程节选

And in fact in one with the girl describing her side, she several times emphasizes this need for protection, need to be free from being torn down from people around them.

事实上像一个女孩子表达的那样，她好几次强调了需要保护的愿望，需要逃离那些打倒她的东西,逃离身边的人们。

麻省理工公开课 - 媒体、教育、市场课程节选