In short, quasar activity, like star formation, was more vigorous in the distant past, a third sign that we live in relatively boring times.是什么意思_In short, quasar activity, like star formation, was more vigorous in the distant past, a third sign that we live in relatively boring times.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句