To look at them is to see the simple solution to a problem that worried people for many centuries.

VOA: special.2010.07.14

The problem is as simple as the fact that millions of people who are unable to move or to communicate.

问题很简单,数以百万的人们无法行动，或者与人交流。

斯坦福公开课 - 7个颠覆你思想的演讲课程节选

It's going to be cancelled next year. I won't get my money back.' Loans must be made even if the debt will be cancelled, for the simple reason that the problem of poverty is a terrible and persistent problem.

因为在来年贷款会被解除，他们就收不回自己的钱了,即使是债务会被免除，人们也必须给人借贷，这仅仅,是因为贫困是一个长久存在的可怕问题。

耶鲁公开课 - 旧约导论课程节选

The problem is that while the principle of risk-sharing is very simple and obvious the practice requires technology.

问题在于,尽管风险分摊原则,听起来浅显易懂,但是实践仍然需要技术支持。

耶鲁公开课 - 金融市场课程节选

So here what we did before was we drew these graphs with probabilities, with beliefs of Player I and the problem here is, previously we had a nice simple graph to draw because there were just two strategies for Player II.

我们之前画了有关概率的图像,图像是在参与人的某个信念下的,但问题是之前参与人II只有两个策略,所以我们能画出那个简单的图像

耶鲁公开课 - 博弈论课程节选