I try to leave every place a little better than I found it.

理解的提高有两个目标：首先，我们自己的知识增长；其次，使我们能够将这些知识传递给他人。

Your self-worth is determined by you. You don't have to depend on someone telling you who you are.

制造链式反应堆的基本点是正确安排材料。