The art of living is to know when to hold fast and when to let go.

金钱不会改变人，而是揭露他们。

To love is to lose, and yet we love anyway.

The writer must believe that what he is doing is the most important thing in the world. And he must hold to this illusion even when he knows it is not true.

矿业企业要注重资源综合利用，提高资源利用效率。