There is no man, however wise, who has not at some period of his youth said things, or lived in a way the consciousness of which is so unpleasant to him in later life that he would gladly, if he could, expunge it from his memory.

The most important word in science is not 'Eureka!' but 'That's funny...'

死亡本身并不可怕；但我们害怕成为未知，去向未知。

如果技术不能解决实际问题，它就毫无意义。