歌剧是一个美丽而非理性的世界。一个人可以用一生去聆听,却仍然不能理解所有的一切。
The improvement of understanding is for two ends: first, our own increase of knowledge; secondly, to enable us to deliver that knowledge to others.
The P versus NP problem is one of the most important problems in computer science.
要养活世界,我们必须首先尊重我们所拥有的资源。
每一个作用力总是有一个相等的反作用力与之对抗。