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只有為別人而活，生命才有價(jià)值。

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.

每個(gè)故事都是一次旅程，每次旅程都會(huì)改變旅者。

"The face of Russia is reflected in the eyes of its people."