技术冲击是经济波动的主要来源。

你首先要做的是说服人类你是他们的朋友，并且你是在为他们的利益行事。

"Sometimes the hardest part isn't letting go but learning to start over."

最好的肥料是农民在田间的身影。

I am always glad to think that my education was, for the most part, informal, and had its roots in the real world.

信心不是乐观或悲观，也不是性格属性。它是对积极结果的期待。