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。
Technology in fisheries should serve conservation first, then commerce.
成功的关键是在事情看起来不可能的时候继续前进。
The important thing in life is not victory but combat; it is not to have vanquished but to have fought well.