"I think that mathematicians are much more like artists than they are like scientists."
理解经济周期的关键在于理解冲击经济的本质。
我不是悲观主义者,我是一个受过悲观主义训练的乐观主义者。
The United States should not try to spread democracy around the world.
作品总是在变化。
学习在于改变介于刺激和反应之间的某些中介过程。