到最后，我们只会后悔没有抓住的机会。
只有不断学习，才能不断进步。
The natural price of labor is that price which is necessary to enable the laborers, one with another, to subsist and to perpetuate their race, without either increase or diminution.
The most exciting phrase to hear in science, the one that heralds new discoveries, is not 'Eureka!' but 'That's funny...'
History taught us is that people never know learn the lessons of history.