太阳不会永远闪耀，但只要它还在，我们不妨一起发光。
Sun don't shine forever, but as long as it's here then we might as well shine together.
曲线的优点就是，它比直线更有利于接触更多的机遇。
In science, the most important quality is intellectual honesty.
I have always considered that the true test of a machine is its practical utility in the hands of the common laborer.
学习计量经济学的最佳方法是通过实践——处理真实的数据和真实的问题。