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In mathematics, the simplest questions often lead to the deepest insights.
在数学中,最简单的问题往往能引出最深刻的见解。
生活中最好的东西是免费的。
There is a history in all men's lives.
The best stories are not found in books, but in the eyes of those who have lived them.
Don't let anyone tell you that you can't do something
Every story has a beginning, a middle, and an end, but not necessarily in that order.