理解布莱克-斯科尔斯模型的关键在于认识到它是基于创建无风险对冲的理念。

Empathy is the key to innovation.

Music is a bridge of the soul, it can cross all obstacles.

In literature, borders disappear; what remains is the universal language of human emotions.

回忆这东西若是有气味的话，那就是樟脑的香，甜而稳妥，像记得分明的快乐，甜而怅惘，像忘却了的忧愁。

原谅你的敌人；没什么能比这样更让他们生气。