Sustainability is not an option, it's an obligation. For our business, for our planet, for future generations.
改变,就像治愈一样,需要时间。
对正义的评估必须基于对实际社会与可行替代方案的某种比较。
I am not without possessions; I have freedom.
A rat in a maze is free to go anywhere, as long as it stays inside the maze.
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。