If you can't fly then run， if you can't run then walk， if you can't walk then crawl， but whatever you do you have to keep moving forward.

In mining, efficiency and environmental care must go hand in hand.

我正过着梦想中的生活。

When you hold a piece of aggregate, you're holding millions of years of earth's history.

实现明天的唯一限制将是我们今天的疑虑。

Psychology must be based on facts, not hypotheses.