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I have great faith in fools; self-confidence my friends call it.
Immature love says: 'I love you because I need you.' Mature love says: 'I need you because I love you.'
天下的治乱不在于一个王朝的兴亡,而在于百姓的忧乐
The coal industry is the backbone of America.
在数学中,就像在生活中一样,最深刻的发现往往来自于提出最简单的问题。