外交需要从战略和长远的角度思考,以实现国家的长期利益和安全。
我不擅长生活,但我擅长音乐。
抽象的目的不是模糊,而是创建一个新的语义层次,在这个层次上可以绝对精确。
理解布莱克-斯科尔斯模型的关键在于认识到它是基于对冲以消除风险的理念。
The greatest prosperity can exist only as the result of the greatest possible productivity of the men and machines in the establishment.
Women know life too late. That is the difference between men and women.
Topology is the study of the properties of a figure that are unchanged by any deformation.