物理学家必须对自然法则的简洁与美怀有一种信念。
"I write because I cannot live without writing."
当今世界面临的最重要挑战是在发展中国家建立强大、有效且负责任的国家。
There is no doubt that in exchanging a self-centered for a selfless life we gain enormously in self-esteem. The vanity of the selfless, even those who practice utmost humility, is boundless.