The Erdős discrepancy problem fascinated me because it was so simple to state yet so deep in its implications.

实现可持续发展的唯一途径是通过持续的技术进步和环境责任。

Freedom is a condition of mind,and the best way to secure it is to breed it.

The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion.

一个国家的真正财富不仅在于其土地，还在于其水域。