Words have no power to impress the mind without the exquisite horror of their reality.
矿业中的多样性不是可选项，而是发展的必要条件。
"I have come to believe that a great teacher is a great artist and that there are as few as there are any other great artists. Teaching might even be the greatest of the arts since the medium is the human mind and spirit."
农民是最早的环保主义者，我们必须支持他们的工作。
可持续性不仅仅是一个流行词；它是我们对后代的责任。