A speculator is a man who observes the future, and acts before it occurs.

能量守恒定律不仅仅是一个抽象原则；它是已被无数实验验证的自然法则。

The future of mining lies in balancing profitability with environmental responsibility.

可持续性不仅仅是一个流行词；它是负责任的采矿的基础。