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。

作家的职责是说出真相，即使这让人感到不适。

And when they leave,they take your life of details with them. You are expected to move on again, but you don't remember what it was that moved you, because no one's asked you in so long. Not even yourself.

电池不仅仅是能量存储设备；它们是可再生能源的推动者。