It's not just the ad, but the product that must be interesting.
I'm not afraid to say what I feel, because that's the way I am.
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。
故事的力量在于它能够将我们彼此连接起来。