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A mathematician is a person who can find analogies between theorems; a better mathematician is one who can see analogies between proofs and the best mathematician can notice analogies between theories.
语言是灵魂的镜子;它反映了我们最深的思想和情感。
天下的事情,祸患常常产生于疏忽细微之处,而人的志向也要警惕逐渐放纵。