在计算中，不变量是短暂的。

To me, you are still nothing more than a little boy who is just like a hundred thousand other little boys. And I have no need of you. And you, on your part, have no need of me. To you, I am nothing more than a fox like a hundred thousand other foxes.

Sometimes you put walls up not to keep people out，but to see who cares enough to break them down.

Science is a journey, not a destination.

解释：看见美丽的容貌就心悦，是人之常情。