The smallest objects that the unaided human eye can see are about 0.1 mm long.
人类肉眼可以看到的最小的物体大约0.1毫米长。
That comet is invisible to the unaided eye.
那颗彗星只用肉眼是看不到的。
Barnard's Loop is too faint to be identified with the unaided eye.
巴纳德环太昏暗以致肉眼无法辨认。
Saturn is the farthest world that you can easily see with the unaided eye.
木星是我们能用肉眼看到的最远的星星。
Saturn is the farthest world that you can easily see with the unaided eye.
木星是我们能用肉眼看到的最远的星星。
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