1.
It is invisible to the naked eye.
那是肉眼看不见的。
2.
There exist all kinds of waves which can not be caught by our eyes.
太空中有各种各样肉眼看不见的波。
3.
A Microscope will reveal much that cannot be seen with the naked eye.
显微镜可以看到许多肉眼看不见的东西。
4.
Marks that are invisible to the eye are made visible by a new technique.
肉眼看不见的斑迹可以用一种新技术显现出来。
5.
fine-grained homogeneous rock (such as basalt) containing minerals undetectable by the naked eye.
成分细密的同质岩石（如玄武岩）含有肉眼看不见的矿物。
6.
tiny invisible pieces of matter that make up everything in the world.
一种肉眼看不见的极小物质，世间万物皆由原子构成。
7.
Microbes are too small to be seen by the naked eye.
微生物很小, 肉眼看不见.
8.
This star is not visible to the naked eye.
这颗星肉眼看不见.
9.
Microbes be too small to be see by the naked eye
微生物很小, 肉眼看不见
10.
Microbes is too small to is see by the naked eye.
微生物很小, 肉眼看不见。
11.
Although we cannot see it,
尽管我们肉眼看不见，
12.
These tiny creatures are hardly visible to the naked eyes.
这些微小的生物肉眼几乎看不见。
13.
Some stars are invisible to the naked eye.
有些星体肉眼是看不见的。
14.
The centers of the drops are so small that the human eye cannot see them.
水滴的核心很小，小得肉眼看不见。
15.
These tiny creature be hardly visible to the naked eyes
这些微小的生物肉眼几乎看不见
16.
These things do not fall under human sight or observation.
这些东西是人的肉眼看不见或观察不到的。
17.
Those far-away stars do not fall under human observation.
那些遥远的星体是人的肉眼所看不见的。
18.
It is only with heart that one can see rightly; what is essential is invisible to the eye.
一个人只有用心灵才能看得真确;重要的东西用肉眼是看不见的。