布莱克-斯科尔斯公式的美妙之处在于它仅依赖于一个不可观测的参数，即股票的波动率。

"Sometimes the hardest thing and the right thing are the same."

The only way to grow is to step out of your comfort zone.

The customer’s voice should always be the loudest in the room.

Libraries were full of ideas—perhaps the most dangerous and powerful of all weapons.

了解持家难处的女性，较易明白治国之难处。