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几个可观察的变量。
The story is the heart of any film; without a compelling story, all the special effects in the world won't save it.
我们不是从祖先那里继承海洋,而是向子孙后代借用。
"When you describe a city, you betray it. The truth is always in the alleyways you omit."