The capital asset pricing model was not intended to be a positive theory of what investors actually do, but rather a normative theory of what rational investors should do.
资本资产定价模型并非旨在描述投资者实际行为的实证理论，而是关于理性投资者应如何行事的规范理论。
小说是我们用来讲述真相的谎言。
能源的未来在于平衡经济增长与环境责任。
Dont ever work for someone you dont want to become.
"Approximation algorithms are a testament to the power of compromise in achieving practical solutions."
故事是一种表达无法用其他方式表达的东西的方式。
On the way to a grand goal， celebrate the smallest victories as if each one were the final goal. No matter where it ends you are victorious.
种树的最佳时间是25年前，第二好的时间是今天。