The old believe everything, the middle-aged suspect everything, the young know everything.
老年人相信一切，中年人怀疑一切，年轻人知道一切。
采矿业必须发展以满足不断变化的世界的需求。
The great powers are always searching for opportunities to gain power at the expense of rivals, and to dominate the system.
如果你不调整，你就会落后——自满在企业中没有立足之地。
可持续性不是一种选择，而是煤炭行业的必需品。