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1·They look like stars to the naked eye.

用肉眼看上去它们像星星。《柯林斯英汉双解大词典》

2·Most stars are not visible to the naked eye.

大多数星星肉眼看不见。《牛津词典》

3·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。

4·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。

5·Mercury is a liquid metal, and mercury, the planet, is the fastest moving naked eye heavenly body. Mars, why is Mars red?

水银是一种液态金属，而水星这颗行星，是肉眼能看到的运动最快的天体。火星，为什么火星是红色的？

6·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。

7·What appears to the naked eye to be glowing is actually a superposition of different lines of distinct frequency. So, this is quantized.

出现在肉眼面前的光亮，事实上是频率不同的光线的叠加。所以，这是量子化的。

8·All are clearly visibly different to the naked eye.

这些不同全部都是肉眼可见。

9·The ova are suspended in a liquid, invisible to the naked eye.

肉眼不可见的ova被混悬在液体中， “是没有味道，而且也感觉不到的”， Weinstock博士说。

10·The microscopic pas DE deux isn't even visible to the naked eye.

这个极微小的双人舞肉眼是看不到的。