科学无国界，因为知识属于人类，是照亮世界的火炬。

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.

细节不是细节，它们构成了设计。