送交者: 4ct 于 2008-12-12, 10:09:29:
回答: 光知道结论算什么明白。 真明白的话就能说服不明白的。 由 湘女 于 2008-12-12, 10:00:10:
A mathematical theory is not to be considered complete until you have made it so clear that you can explain it to the first man whom you meet on the street.
-David Hilbert