Sometimes it seems as if there are more solutions than problems. On closer scrutiny, it turns out that many of today's problems are a result of yesterday's solutions.

唯一能把我拉下来的人就是我自己，我不会再让自己把自己拉下来了。

The old believe everything; the middle-aged suspect everything; the young know everything.

可持续发展不再是可选项，而是任何负责任的采矿业务的必要条件。