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The art of teaching consists in large part of the ability to awaken the natural curiosity of young minds and to satisfy it with the nourishment of knowledge.
Mathematics is the music of reason.
When you have something to say, silence is a lie.
The only real mistake is the one from which we learn nothing.
大萧条是二十世纪的决定性宏观经济事件,它引发了对宏观经济理论和政策的根本性重新思考。