数学家是能在定理之间找到类比的人;更好的数学家是能在证明之间看到类比的人;而最好的数学家是能注意到理论之间类比的人。
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.
光勤劳是不够的,蚂蚁也是勤劳的。要看你为什么而勤劳。
模型的好坏取决于其所基于的数据。
The only limits in life are the ones you set for yourself.