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I'm a firm believer in karma. You get what you give, whether it's bad or good.

【釋義】務必保證貨物的質量，不要讓貨幣閑置。

閱讀是穿越時間的航行。

The use of a program to prove the 4-color theorem will not change mathematics - it merely demonstrates that the theorem, a challenge for a century, is a finite problem.

數學的美在于它能夠以最抽象的術語描述宇宙。