银河系中心附近的恒星就像宇宙时钟，帮助我们绘制时空图。
The history of philosophy is not, like the history of the sciences, to be considered as a mere chronological record of discoveries and errors. It is the history of the human spirit in its endeavor to understand itself and its relation to the universe.
全球竞争力的关键在于本地适应性。