"To live is the rarest thing in the world. Most people exist, that is all."

古代著书立说的人，都是有所为而发的。

物理学的美丽在于它能够用最深刻的理论解释最简单的现象。

That’s one small step for a man, a giant leap for mankind.

Do what you can, with what you have, where you are.

人生之所以美丽，是因为它不会总是如你所愿。