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

Never be afraid to take risks. The biggest rewards often come from the biggest risks.

互联网正在成为未来地球村的城镇广场。

解释：饿了再吃，粗茶淡饭味道也像吃肉一样可口。安稳走路就不会感觉到劳累，权当坐车。