经济研究应旨在为现实世界的决策提供信息。
Success is not the key to happiness. Happiness is the key to success. If you love what you are doing, you will be successful.
I am God's vessel. But my greatest pain in life is that I will never be able to see myself perform live.
The language of mathematics is universal, transcending cultural and linguistic barriers.
一个心理过程的价值在于它的生存效用。