The beginning of the problems with CO2 and global warming.

二氧化碳和全球变暖的问题2,也从此产生。

麻省理工公开课 - 热力学与动力学课程节选

We've had other economic problems that have led to recessions but it hasn't seemed to be something as potentially global as it is now.

我们经历过其他导致经济衰退的,经济问题，但是这些都不是,像现在这样全球化的问题。

耶鲁公开课 - 金融市场课程节选