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- 我们不能用肉眼看到微生物。
We can't see microscopic creature with naked eyes.
- 这颗星肉眼看不见。
This star is not visible to the naked eye.
- 微生物很小，肉眼看不见。
Microbes are too small to be seen by the naked eye.
- 细菌太小，肉眼看不见。
Bacteria are too small to see with the naked eye.
- 细菌用肉眼看不见。
Germs are invisible to the naked eye.
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