The worth of a psychological theory is measured by its usefulness.
The mining industry has a responsibility to leave communities better than we found them.
"Hope is the only thing stronger than fear."
當(dāng)一種程序語(yǔ)言的程序需要引起注意時(shí)，它是低級(jí)的。
釋義：用兵之人，不出手則已，一旦出手就必須展現(xiàn)霸主之氣。
Coal built the modern world, and it's our responsibility to ensure its legacy is managed with wisdom.