正向强化的实施方式比其数量更重要。

The first rule of government spending: why build one when you can have two at twice the price?

即使世界正在转向低碳解决方案，石油和天然气的创新也不会停止。

I’m focused on what I can control. I can’t control what people think or say about me.

经济转型的成功取决于正式制度与非正式制度的兼容性。