the naked eye
US /ðə ˌneɪ.kɪd ˈaɪ/
UK /ðə ˌneɪ.kɪd ˈaɪ/
短语
肉眼
the human eye when it is not aided by a microscope, telescope, or other optical instrument
示例:
•
The planet is visible to the naked eye on a clear night.
在晴朗的夜晚，这颗行星用肉眼就能看见。
•
Bacteria are too small to be seen with the naked eye.
细菌太小了，肉眼看不见。