translation.en: I want to talk today about -- I've been asked to take the long view, and I'm going to tell you what I think are the three biggest problems for humanity from this long point of view.
translation.zh: 今天我所要讲的是- 他们让我谈谈长远的观点-我要告诉你们 我认为，从长远来看， 人类面临着三大问题。