历史学家必须是诗人，不是为了创造，而是为了重新创造。
The concept of polynomial-time reduction is central to understanding the structure of NP-complete problems.
The truth is not always beautiful, nor beautiful words the truth.
"In the midst of winter, I found there was, within me, an invincible summer."
Listen, my heart, to the whispers of the world with which it makes love to you.
To write is to make the invisible visible.