自由之树必须不时用爱国者和暴君的鲜血来浇灌。
The tree of liberty must be refreshed from time to time with the blood of patriots and tyrants.
创新是区分领导者和追随者的关键。
科学中最强大的工具不是技术，而是想象力。
You think when you wake up in the mornin yesterday don't count. But yesterday is all that does count.
I don't believe in perfection. I think that's a very dangerous idea. It's a very unattainable idea.
测量可测量的，并使不可测量的成为可测量的。