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過去是一張地圖，顯示我們曾去過哪里。

Remember, if you ever need a helping hand, you'll find them at the end of each of your arms.

The farmer is the only man in our economy who has to buy everything at retail, sell everything at wholesale, and pay the freight both ways.

學習數學的最好方法就是做數學。

The only constant is change, continuing change, inevitable change, that is the dominant factor in society today. No sensible decision can be made any longer without taking into account not only the world as it is, but the world as it will be.

我不知道如何解釋，但我覺得我生來就是做這個的。

一個人不能失去欲望。它們是創造力、愛和長壽的強大刺激物。