In fact there's a fundamental limit to how much of the universe we could ever observe, no matter how advanced our visual instruments.
事实上，不管我们的目视仪器有多么先进，我们所能够观察到的宇宙都有一个基本限度。
Telescopes and microscopes are visual instruments.
望远镜和显微镜是光学仪器。
Telescopes and microscopes are visual instruments.
望远镜和显微镜是光学仪器。
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