数学家是能在定理间找到类比的人;更好的数学家能在理论间看到类比;而最优秀的数学家能注意到类比之间的类比。
Words have the power to heal, but they can also wound deeply.
我们生产的每一件塑料制品都应该有明确的再利用或回收路径。
"Silence can be more powerful than words."