In short, quasar activity, like star formation, was more vigorous in the distant past, a third sign that we live in relatively boring times.

• 简单地说，类星体的活动就像恒星的形成一样，在遥远的过去比今天更为猛烈，这是第三个指标，显示出我们生活在一个相对较为乏味的年代。