The most powerful art is often the simplest.

发现的喜悦无疑是人类心灵所能感受到的最活跃的喜悦。

煤矿工人是美国工业实力的无名英雄。

If you want to build a great enterprise, you have to have the courage to dream great dreams.

煤炭一直是工业的支柱，通过创新，它可以继续发挥作用。