社会无法发展出有效、低成本的合同执行机制，是历史上停滞和当代第三世界欠发达的最重要根源。

I am a very committed wife. And I should be committed too - for being married so many times.

To me, fearless is not the absence of fear. It's not being completely unafraid. To me, fearless is having fears. Fearless is having doubts. Lots of them. To me, fearless is living in spite of those things, every single day.

We don't just extract oil; we extract potential for economic growth and development.

我们越是靠理智生活，就越不理解生命的意义。

Every piece of plastic ever made still exists somewhere on this planet—that's both our challenge and our responsibility.

未来属于那些相信自己梦想之美的人。