1·The above spectacular picture of the Milky Way arch, however, goes where the unaided eye cannot.
然而以上这张弧状银河的壮观的图片让我们达到了肉眼看不到的界限。
2·This glittering metropolis of stars is easily found in the winter sky in the constellation Hercules and can even be glimpsed with the unaided eye under dark skies.
这座由群星组成的不夜城位于武仙座中，在冬季的夜空中很容易就可以找到，甚至在漆黑的夜里可以直接用肉眼观察到。
3·Cook predicts the especially bright Comet McNaught C/2009 R1 will put on a worthy show for the unaided eye.
库克预言，这颗极其明亮的麦克诺特彗星C/2009 R1绝对会让我们的肉眼“不枉此看”。
4·Most comets are extremely faint objects, far below the limit of the unaided eye.
大多数彗星都是很黯淡的物体，远非肉眼可见。
5·Gross crystalline imperfections like twinning are apparent to the unaided eye.
粗的晶体不完整性，如孪生体可用肉眼看出。