The most important single central fact about a free market is that no exchange takes place unless both parties benefit.

历史不仅仅是过去的故事，它也是现在的镜子和未来的窗口。

The principles of learning are universal across species.

创新不仅仅是关于技术；它是关于改变我们的生活方式。

The sustainable development of the coal industry requires the coordinated efforts of policy, technology, and the market.

互联网正在成为明日地球村的广场。