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"The world is a book, and those who do not travel read only a page."

The concept of reducibility is central to understanding the relationships between different computational problems.

【講解】：不怕東西少而怕分配不均勻，不怕貧困而怕不安定。

The power of a man, is his present means, to obtain some future apparent good.

朗蘭茲綱領的美在于它能夠揭示隱藏的聯系。