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。
心理现象最好被理解为环境需求与有机体反应之间的桥梁。
You will be judged on how well you treat those who can do nothing for you.
The most important political virtue is moderation.
创作是对必然的反抗。
The stone industry must embrace sustainability to survive in the long run.