中英互译

sign a compact

双语例句

One telltale sign is that black holes are often marked by a compact cluster of stars that surround them, which were pulled from the dwarf galaxy when the black hole escaped.
有证据说明，黑洞的明显标志就是它的周围经常有一群密集的恒星，这是因为黑洞从银河系逃脱的时候所造成的。