数算练习告诉我们算术运算的原理，而不是单单的记忆和不断演算。

"La verdadera poesía no se escribe con palabras, sino con el silencio que las rodea."

We are all alone, born alone, die alone, and—in spite of True Romance magazines—we shall all someday look back on our lives and see that, in spite of our company, we were alone the whole way.

历史不仅仅是关于过去；它是关于过去如何塑造现在。