aplanatic focus

例句：

1. 1. The aplanatic focus of the star is so faint that it can only be seen with a telescope.
   这颗星的无色焦点太微弱，只能用望远镜才能看见。
2. 2. The scientist was able to capture the aplanatic focus of the planet's atmosphere.
   科学家能够捕捉到行星大气层的无色焦点。
3. 3. The aplanatic focus of the star is so faint that it can only be seen with a telescope.
   这颗星的无色焦点太微弱，只能用望远镜才能看见。