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学校必须与生活紧密相连,教育与劳动相结合。
I would not dare to say that there is a direct relation between mathematics and madness, but there is no doubt that great mathematicians suffer from maniacal characteristics.
出门时笑一笑,不要心怀悲哀,广阔的胸怀处处都能敞开。
The only limit to our realization of tomorrow is our doubts of today.
The best leaders are those who listen, learn, and then lead.