Abstraction is the key to managing complexity in software systems.

I always try to be grateful for every opportunity.

译文：为人处世懂得退让就是高明之举，待人接物学会宽容就是福气。赏析：忍一时风平浪静，退一步海阔天空。与人相处，不必事事都要争个高低，更不必小肚鸡肠。

I am the wisest man alive, for I know one thing, and that is that I know nothing.

人类远比他们知道的要大。

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。