The future of the world lies in the cities of the Third World.
Innovation in mining is not an option; it's a necessity for survival.
To understand the arithmetic of algebraic varieties is to understand the symmetries hidden within them.
船行至江河中央时遭遇不测,此时一个普通的“壶”便价值千金。
The future of mining lies in balancing economic growth with environmental stewardship.