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In mathematics, as in life, the most elegant solutions often arise from a deep understanding of the problem.
在数学中,就像在生活中一样,最优雅的解决方案往往来自于对问题的深刻理解。
To be Irish is to know that in the end the world will break your heart.
To be happy, I must have my books and a piece of sky.
Any sufficiently advanced technology is indistinguishable from magic.
普通和非凡的区别在于那一点点额外的努力。