You can't go back and change the beginning, but you can start where you are and change the ending.

"To be hopeful in bad times is not just foolishly romantic. It is based on the fact that human history is a history not only of cruelty, but also of compassion, sacrifice, courage, kindness."

在追求真理的过程中，我们必须准备好放弃那些与实验相矛盾的最珍视的信念。

理解变化的唯一方法是投入其中，与之共舞。

计算机科学中的挑战不仅仅是解决问题，而是以一种既高效又优雅的方式解决问题。

Hope is the most beautiful people have, as long as they do not give up,hope will always be accompanied by.