Fast radio bursts — short, powerful flashes of radio waves from distant galaxies— have tantalized astronomers for 13 years.

快速电波爆发——来自遥远星系的短而强大的射电波闪光——13 年来一直在诱惑着天文学家。

And scientists say they have detected some sort of signal from outside it, fast radio bursts that repeat.

科学家们说，他们已经探测到某种来自外部的信号，快速无线电重复爆发。

Fast radio bursts are a real mystery.

快速射电暴是一个真正的谜。

Number three are fast radio bursts.

第三个是快速射电暴。

There are probably more theories about what makes fast radio bursts, than there are actual detections of these things.

可能有更多关于是什么产生快速射电暴的理论，而不是对这些东西的实际检测。

Considered one of the biggest mysteries in astronomy, fast radio bursts or FRBs were first discovered in the year 2007 and since then, over two dozen of them have been observed.

被认为是天文学中最大的谜团之一，快速射电暴或 FRB 于 2007 年首次被发现， 从那时起，已经观察到超过两打。