老鼠和人之间的唯一区别是老鼠会从经验中学习。

"It's not generally realized that all writers, even the greatest, are also readers first and last."

"Literature is the art of making the invisible visible."

文学是作者和读者之间不断的对话。

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。