可持续发展不再是可选项;它是任何希望长期繁荣的企业的必需品。
To write is to confront the chaos of existence and give it meaning.
The search for reciprocity laws is a fundamental theme in the history of mathematics.
好的市场设计能让个人激励与社会效率保持一致。
"To write is to speak without being interrupted."