森林不仅仅是一种资源;它是我们留给后代的遗产。
The best way to document a program is to document it.
"Books are the mirrors that show us who we are."
The beauty of mathematics lies in its ability to simplify the complex.
自由市场最重要的一个核心事实是,除非双方都受益,否则交易不会发生。