采矿业必须发展以满足不断变化的世界的需求。
You can tell more about a person by what he says about others than you can by what others say about him.
"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."
人之所以比禽兽尊贵，是因为人懂得“礼”啊。后人常用这句话说明“礼”在我们生活中的重要性。讲究“礼”，是有修养、有道德的表现。
追求知识是一生的旅程，总有更多的东西要学习。