Cassegrainian secondary

例句：

1. 1. The Cassegrainian secondary is a crucial component of our planetary observation system.
   卡塞格伦次级望远镜是我们行星观测系统的关键组成部分。
2. 2.The Cassegrainian secondary has enabled astronomers to observe distant galaxies with unprecedented clarity.
   卡塞格伦次级望远镜使天文学家能够以前所未有的清晰度观察遥远的星系。
3. 3.The Cassegrainian secondary is used in conjunction with other telescopes to provide detailed images of celestial objects.
   卡塞格伦次级望远镜与其他望远镜结合使用，用于提供天体对象的详细图像。