世界的美有两面，一面是欢笑，一面是痛苦，将心切成两半。
The beauty of the world has two edges, one of laughter, one of anguish, cutting the heart asunder.
A computer program does what you tell it to do, not what you want it to do.
The deterioration of every government begins with the decay of the principles on which it was founded.
The development of quantum algorithms requires a deep understanding of both quantum mechanics and computer science.
