“这就是学习的意义。你突然以一种新的方式理解了你一生都理解的东西。”
That is what learning is. You suddenly understand something you've understood all your life, but in a new way.
宁静的灵魂比烦乱的灵魂更为智慧。
水泥生产中的创新必须平衡效率与环境责任。