理解布莱克-斯科尔斯模型的关键在于认识到它是基于对冲以消除风险的理念。

To talk about painting is not only difficult but perhaps pointless too.

"A man's memory might have only a hundred clear days in it and he has lived thousands."

全红婵在一次采访中谈到训练

"You have to put in the hours because there’s always something which you can improve."