For anything that far away to appear from Earth the way quasars do, it would have to burn steadily at a rate that produces more light than 90 billion suns would produce.
“,”后面的看的懂, 逗号前的 far away to是做动词? 貌似没这种用法吧 作形容词话前面应该有is啊
还有appear from, 还有the way quasars do ,是不该改成 in the way as quasars do 或者 the way in which quasars do?