数学家的工作永远不会完成；总有新的问题需要探索，新的谜团需要揭开。
A mathematician's work is never done; there are always new questions to explore and new mysteries to uncover.
建筑是一种象征，建造行为也是。建筑是人类创造的最沉重、最永久的事物之一，它们是通过巨大的努力和牺牲而建成的。
Literature is the memory of humanity, the record of our collective soul.
Foreign powers do not seem to appreciate the true character of our government.
成功的真正标准是你如何处理失败。
Sustainability is not just a trend, it's our responsibility to the future.
煤炭使美国在世界范围内保持竞争力。