A large fire then broke out, engulfing several shops and spewing a cloud of gray smoke over the area.

VOA: standard.2009.10.28

it becomes a gray area but it should be pretty clear if you can treat something is reversible are irreversible.

这是个灰色区域,但什么可以当作可逆过程处理,而什么要当作不可逆过程,这是相当清楚的。

麻省理工公开课 - 热力学与动力学课程节选

You'll read more about it in the Peter Gray textbook and more about it in The Norton readings on development, but just to raise this as an interesting area of debate.

你会在彼得·格雷的教材,以及诺顿读本的发展心理学部分,阅读到更多该方面的内容,我说这个只是想将此作为,一个有趣的辩论内容

耶鲁公开课 - 心理学导论课程节选