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。

"The best way to learn is to do it, to make mistakes, and to learn from them."

乳制品行业必须在传统与进步之间取得平衡，以满足现代需求。

The sun is our most powerful tool in Africa. We must learn to work with it, not against it.

计算理论与心智哲学和智能的本质有着深刻的联系。