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The joy of solving a mathematical problem is unparalleled; it is a moment of pure intellectual triumph.

To read is to travel, to travel to other places, to other times, to other minds.

Books say: She did this because. Life says: She did this. Books are where things are explained to you; life is where things aren't.

我們必須投資未來，而不僅僅是開發(fā)現(xiàn)在。