Black Hole Physics

• Seyfert；黑洞物理；星系

Black Hole Physics的用法和样例：

例句

1. An active galaxy is a star system with a humongous black hole at its centre.
   一个活跃的星系是一个中央部位有一个极大的黑洞的恒星体系。
2. Initially the gas in the cluster is very hot, and the supermassive black hole in a centrally located large galaxy is quiet.
   起初星系团里的气体温度极高，而位在星系团中央巨大星系里的黑洞并不活跃。