这些黑洞通过“吞食”大量的气体而肥大起来。
These black holes have been fattened up by huge amounts of gas.
这些黑洞也是引力透镜实验潜在的探测目标。
These black holes are also potentially detectable through their lensing effects.
结果：沃尔特表示：“这意味着这些黑洞最先开始形成。”
The upshot: "The implication is that the black holes started growing first," Walter said.
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