数学的本质不是把简单的事情复杂化,而是把复杂的事情简单化。
The surest way to corrupt a youth is to instruct him to hold in higher esteem those who think alike than those who think differently.
我们教育体系的一个明显的特征是对儿童人格的尊重、并达到前所未有的程度。