研究小组通过比较黑洞和它的寄主星系的质量，可以确定这些黑洞吞噬了多少物质。
The team also compared the masses of the black holes with the total masses of their host galaxies to determine how much matter they had swallowed.
研究小组通过比较黑洞和它的寄主星系的质量，可以确定这些黑洞吞噬了多少物质。
The team also compared the masses of the black holes with the total masses of their host galaxies to determine how much matter they had swallowed.
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