百年成之不足，一旦败之有余。
【释义】经过多年努力也还不够，一旦毁坏却十分彻底。
Efficiency and technology are the keys to surviving in a volatile oil market.
It is the duty of a student to get everything out of a teacher， and the duty of a teacher to get everything out of a student.
To be human is to be in the world, and to be in the world is to be in time.
The best business model is a monopoly.
自然是自由的领域，因为在她的统治下，任何专制都无法存在。