真正的爱情是属于成年人的。

适合从事任何特定行业的人，如果没有与他一起工作或在他之上的人的帮助和指导，就无法理解该行业的科学。

You can't just give up on someone because the situation's not ideal.

可持续性不是选择，而是我们对后代的责任。

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.