发现恒星围绕银河系中心的超大质量黑洞运行是天体物理学的一个转折点。
The discovery of stars orbiting the supermassive black hole at the galactic center was a turning point in astrophysics.
The process of verification is as important as the process of creation in computer science.
新能源不仅是产业升级的方向，更是国家战略的重要组成部分。