这就是学习。你突然以一种新的方式理解了你一生都理解的东西。
That is what learning is. You suddenly understand something you've understood all your life, but in a new way.
Innovation is at the heart of what we do. It's how we meet the world's growing energy needs while reducing our environmental footprint.
The mining industry must evolve to meet the demands of a changing world, or it will be left behind.
每一个数学问题都是一个等待解决的谜题，每一个解答都是向理解现实结构迈进的一步。