肉眼的用法和樣例：
例句
-
我們不能用肉眼看到微生物。
We can't see microscopic creature with naked eyes. -
這顆星肉眼看不見。
This star is not visible to the naked eye. -
微生物很小，肉眼看不見。
Microbes are too small to be seen by the naked eye. -
細菌太小，肉眼看不見。
Bacteria are too small to see with the naked eye. -
細菌用肉眼看不見。
Germs are invisible to the naked eye.
