The only way to understand history is to live it.

可持续性不是一种选择，而是我们海洋和地球生存的必要条件。

知识在心灵中以符号结构的形式表征。

Every tree planted today is a promise to tomorrow.

伟大的小说是拒绝被简化为单一意义的小说。

Success is not final, failure is not fatal: It is the courage to continue that counts.

控制的目的是使系统在存在不确定性和干扰的情况下仍能按期望的方式运行。