理解布莱克-斯科尔斯模型的关键在于认识到它是基于风险中性世界的概念,在这个世界中投资者对风险漠不关心。
The only meaningful way to study learning is through objective measurement.
痛苦并不总能带来转变,有时它只是伤害。
The past is a foreign country; they do things differently there.
La música es el lenguaje universal que nos une a todos.