Maybe you can see the Great Wall clearly from space with binoculars but not with the naked eye.

也许你可以用双筒望远镜从太空中清楚地看到长城，但用肉眼却看不见。

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From end to end, the Milky Way's starry disk, observable with the naked eye and through optical telescopes, spans 120,000 light-years.

从一端到另一端，银河系布满星星的圆盘横跨12万光年，可以用肉眼和光学望远镜观察到。

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Usually there is only one or two a year bright enough to be seen with the naked eye.

通常，一年只有一到两颗彗星明亮得肉眼可见。

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He leaves the telescope at home and stares into the endless night sky with the naked eye.

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Called micro miniatures, the artwork is so small that it cannot be seen with the naked eye.

CNN: Mice on toast; eye-of-the-needle art

For example, when it's visible, Venus is so bright it can be easily spotted with the naked eye.

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