They look like stars to the naked eye.
用肉眼看上去它们像星星。
Most stars are not visible to the naked eye.
大多数星星肉眼看不见。
Usually there is only one or two a year bright enough to be seen with the naked eye.
通常，一年只有一到两颗明亮得肉眼都能看见的彗星。
Maybe you can see the Great Wall clearly from space with binoculars but not with the naked eye.
也许你可以用双筒望远镜从太空中清楚地看到长城，但用肉眼却看不见。
Mercury is a liquid metal, and mercury, the planet, is the fastest moving naked eye heavenly body. Mars, why is Mars red?
水银是一种液态金属，而水星这颗行星，是肉眼能看到的运动最快的天体。火星，为什么火星是红色的？
From end to end, the Milky Way's starry disk, observable with the naked eye and through optical telescopes, spans 120,000 light-years.
从一端到另一端，银河系布满星星的圆盘横跨12万光年，可以用肉眼和光学望远镜观察到。
What appears to the naked eye to be glowing is actually a superposition of different lines of distinct frequency. So, this is quantized.
出现在肉眼面前的光亮，事实上是频率不同的光线的叠加。所以，这是量子化的。
All are clearly visibly different to the naked eye.
这些不同全部都是肉眼可见。
The ova are suspended in a liquid, invisible to the naked eye.
肉眼不可见的ova被混悬在液体中， “是没有味道，而且也感觉不到的”， Weinstock博士说。
The microscopic pas DE deux isn't even visible to the naked eye.
这个极微小的双人舞肉眼是看不到的。
"You can't see it with the naked eye, but a computer can," she says.
“这用肉眼是看不见的，但是计算机却可以，”她说。
Its movement - an inch every minute - could be seen with the naked eye.
它每分钟移动一英寸，用肉眼就能看到。
The light we emit is about 1000 times lower than the naked eye can see.
我们身体所发的光比肉眼能见的低1000倍。
Scientists said the eclipse could be safely observed with the naked eye.
科学家表示本次月食裸眼观测是安全的。
It becomes visible to the naked eye every 76 years when it nears the sun.
它每隔76年靠近太阳时，变得肉眼可见。
Unlike solar eclipses, lunar eclipses are safe to watch with the naked eye.
与日食不同，裸眼看月食是安全的。
L the Great nebula of Orion is a glowing nebula just visible to the naked eye.
l猎户座星云是只用肉眼就可以看见的星云。
Unfortunately, with the naked eye it's hard to see exactly what makes them messy.
不幸的是，肉眼很难看出到底是什么搅乱了它们。
On a clear day, they can see France with the naked eye, two dozen miles away.
天气晴朗的日子，他们一眼就可望见二十哩外的法国。
A great number of these collisions create the light that's visible to the naked eye.
数以万计的这种撞击就形成了我们肉眼所能够看到的这种光。
The pumpkin pollen grain in the middle is0.2mm and just about visible to the naked eye
中间的南瓜花粉有0.2毫米，肉眼刚刚能看见。
Ancient man also noticed how the five planets visible to the naked eye twinkled in the night sky.
古代的人们看到肉眼可见的五大行星在夜幕中闪烁。
With a few tips and tricks you can actually learn to see more in the night sky using your naked eye.
掌握些窍门和技巧后，你可以学到如何借助肉眼在夜空中观察更多的景象。
Some of the most spectacular night skies are visible to the naked eye - although sadly not from the UK.
一些最耀眼的夜空可以用肉眼看到——但很可惜不在英国。
Instead, even objects big enough to be seen with the naked eye can take on slippery quantum properties.
甚至大到用肉眼也可看见的物体也有一些量子性质。
It is 128 light years from Earth, and is just visible to the naked eye in the constellation of Pegasus.
它距地球128光年，在飞马座中刚好能被肉眼可见。
Binoculars or telescopes are not required, experts say the naked eye is best for watching the meteors.
专家称不需要双筒望远镜，只要裸眼就可以非常好的观看到流星。
A corneal ulcer can be seen as a white or gray round spot on the cornea that is visible with the naked eye.
裸眼就可观察到角膜溃疡为位于角膜上的白色或灰色圆形病灶。
Binoculars, a telescope or even the naked eye will provide a view of the moon's craters and surface features.
双筒望远镜、望远镜、甚至用肉眼会看到月亮上的陨石坑和表面的地貌。
Some star clusters can beseen with the naked eye, such as the famous Pleiades cluster in theconstellation Taurus.
我们可以用肉眼观察到一些星团，例如位于金牛座内大名鼎鼎的昴星团。
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