external focussing telescope

例句：

1. 1. This new model of external focussing telescope is expected to revolutionize the field of astronomy.
   这款新型的外部聚焦望远镜预计将彻底改变天文学领域。
2. 2.The external focussing telescope was used to study the movements of stars in space.
   外部聚焦望远镜被用来研究太空中恒星的运动。
3. 3. The external focussing telescope has made it possible for astronomers to observe distant galaxies with greater clarity.
   外部聚焦望远镜使得天文学家能够用更清晰的方式观察遥远的星系。