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One does not learn computing by using a hand calculator, but one can forget arithmetic.
每一栋建筑都是原型,没有两栋是完全相同的。
最危险的敌人往往是我们自己。
A good mathematician is not one who knows all the answers, but one who asks the right questions.
Human kindness has never weakened the stamina or softened the fiber of a free people. A nation does not have to be cruel to be tough.