The future of energy lies in the balance between traditional resources and renewable alternatives.

生命不是一个段落，死亡也不是一个括号。

国家不是艺术品，而是一种必需。

今天的科学是明天的技术。

"A book is a friend that never lets you down."

We teach a subject not to produce little living libraries on that subject, but rather to get a student to think mathematically for himself.