Astronomers例句
Early
astronomers thought that our planet was the centre of the universe.
早期的天文学家认为我们的星球是宇宙的中心。
Space scientists and
astronomers have taken another step forwards.
航天科学家和天文学家又取得了进展。
Astronomers used to ask why only Saturn has rings.
天文学家们过去一直感到奇怪,为什么只有土星有光环.