采矿业必须发展以满足不断变化的世界的需求。
如果你在小事上无原则，那么大事上一样没有原则。
The great challenge of the modern world is to create institutions that are strong enough to govern effectively but also accountable and responsive to the needs of citizens.
If a man will begin with certainties， he shall end in doubts； but if he will be content to begin with doubts， he shall end in certainties.