爱能治愈一切创伤。

数学不仅仅是一系列抽象概念的集合，而是一种让我们理解宇宙的语言。

The opening up of new markets, foreign or domestic, and the organizational development from the craft shop and factory to such concerns as U.S. Steel illustrate the same process of industrial mutation—if I may use that biological term—that incessantly revolutionizes the economic structure from within, incessantly destroying the old one, incessantly creating a new one.