广义相对论在某种意义上就是引力场的理论。

我是在书本上而不是在课堂上认识伟大的知识分子的，这很自然。我的家人都喜欢这些东西，通过纪律、知识和自我控制来出人头地。

"Life on a lifeboat isn't much of a life. It is like an end game in chess, a game with few pieces. The elements couldn't be more simple, nor the stakes higher."

Life is a journey, and every step is important.

"Science is a way of thinking much more than it is a body of knowledge."

语言是我们改变世界最强大的武器。