布莱克-斯科尔斯公式的美妙之处在于它仅依赖于一个不可观测的参数，即股票的波动率。
Home is not a place, it's a feeling.
Sustainability is not an option; it's a necessity for the future of our industry.
如果你不愿意冒险，就永远无法创造出真正非凡的东西。