大自然不做徒劳无功的事。
The process of doing mathematics is as important as the result itself.
劳动分工在尽可能程度上引入,在每一门艺术中都会导致劳动生产力的相应增加。
The goal of cryptography is to make it so that the cost of breaking the system exceeds the value of the information protected.
Light is the origin of all being.