布莱克-斯科尔斯模型的美妙之处在于它将期权定价问题简化为估计几个关键参数，尤其是波动率。

The novel is the most democratic of art forms because it belongs to the reader as much as to the writer.

The world is so full of a number of things, I'm sure we should all be as happy as kings.

A writer's duty is to illuminate the shadows of the human soul.

The only way to make sense out of change is to plunge into it, move with it, and join the dance.

"All the other children at my school are stupid. Except I’m not meant to call them stupid, even though this is what they are."

We need never be ashamed of our tears.

自由贸易使得资源得以最优配置。