The history of mathematics is a history of human thought and progress.
In the vast expanse of the universe, the answers we seek are often hidden in the most unexpected places.
地理学是关于地方的科学,而不是关于人的科学。
历史不是关于陌生人的故事,不是来自另一个世界的异类;它是关于如果早出生一点的我们的故事。
Quality is the life of an enterprise and the cornerstone of a brand.