自然实验可以为经济问题提供有价值的见解。
Natural experiments can provide valuable insights into economic questions.
Every performance is a new journey, and I learn something new every time I step on stage.
I have noticed that youngsters given to the climbing habit usually do something when they grow up.
农业创新不仅仅是技术问题；它关乎改变思维方式，为子孙后代培育土地。
Success in business comes from understanding the customer better than anyone else.
The only thing that stands between you and your dream is the will to try and the belief that it is actually possible.
The best way to be successful is to believe in yourself.