"They're essentially the tip of the iceberg," Gebhardt says of the objects so far observed.
“他们本质上是冰山的一角，”葛布哈特评论那些被观察到的遥远的物体。
2
"It's the most accurate mass estimate ever obtained" for a supermassive black hole, says Gebhardt.
“对于超级黑洞，这是所得到的最为精确的估算，”格布·哈特说。
3
Stellar motions in the core of the giant galaxy do indeed suggest that it may have experienced a black hole merger in the not-too-distant past, says Gebhardt.