战争的目的不是要你为你的国家牺牲，而是要让你的敌人为他的国家牺牲。

追求知识是一段永无止境的旅程。

"In observational studies, we often have to rely on assumptions that are not directly testable."

激光对于阿秒物理学的意义，就像望远镜对于天文学的意义一样。

"The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion."

I'm very proud to be black, but black is not all I am. That's my cultural historical background, my genetic makeup, but it's not all of who I am nor is it the basis from which I answer every question.