We have to cancel all other light sources to see this very, very dim light from the atoms.
我们不得不遮蔽所有其他的光源，才能看到这个原子非常暗淡的光线。
I am sure you all know from physics class about how light moves in microscopic ways and that we can only see light when the wavelength of that light is in a specific range.
我相信，你们在物理课上都学过光是如何以微观的方式运动的，以及只有在光的波长在特定的范围内时我们才能看到光这一事实。
When we consider the nightly lifestyle of these bats, we will see they have to be sensitive to the changing light levels because this is how they sense when to start hunting.
当我们考虑这些蝙蝠的夜间生活方式时，我们会发现，它们必须对不断变化的光线水平保持敏感，因为这是它们感知何时开始狩猎的方式。
The light that we see with our human eyes as a band of rainbow color falls in the range of what's called visible light.
我们用肉眼看到的彩虹色的光属于可见光。
Using ultraviolet light, we can see the spectral signature of each component part of the pigment.
通过利用紫外光，我们可以看到颜料各个组成部分的光谱特征。
So we have to cancel all other light sources to see this very, very dim light from the atoms.
因此，我们不得不遮蔽所有其他的光源，才能看到这个原子的非常，非常暗淡的光线。
However, we can use relativity as a model to see what happens at speeds close to that of light.
不过，我们可以用相对论这个模型来看看接近光速的情况下会发生什么。
Once we detected a planet, we would have to find a way of blotting out the light from its star, so that we would be able to 'see' the planet properly and analyze its atmosphere.
一旦我们找到这样一颗行星，我们就要想办法将它的恒星射过来的光线遮暗，这样我们就能彻底“看见”这颗行星，并分析它的大气层。
Therefore, the light we see coming from the sun was actually generated millions of years ago.
因此我们看到的从太阳来的光其实是几百万年前产生的。
WE CANNOT see what lies beyond the visible horizon of our universe, simply because light emitted beyond that horizon has not had time to reach us.
所以我们不能看到宇宙里可见视野之外，仅仅是因为在超越视野之外的物体所发射的光线已经没有时间来送达给我们。
And so as we move out, we see continuously from our planet all the way out into the real of galaxies as we see here, light travel time, giving you a sense of how far away we are.
接下来让我们向外太空移动，我们看到，持续不断的从我们星球的各个角度进入到真实的银河系，就像我们在这里看到的一样，让旅行的时间发光，给你一种我们的存在是如此深远的感觉。
The photosphere is the lowest layer of the sun's atmosphere, and emits the light we see.
光球是太阳大气的最底层，我们看到的光线就是从它发出的。
"Our world is dull by comparison - we humans see within a limited range of light wavelengths, and hear just a bit of sound," he says.
“相比之下，我们的世界时枯燥的——我们人类只能看到有限波长的光，有限频率的声音。”他说。
Just like we see destructive interference with water waves or with light waves, we can also see destructive interference with orbitals.
就像我们看到水波，和光波的相消干涉，我们也可以看到轨道的相消干涉。
The light travels through these slits and then at the far end here we have a screen on which we see where the light has fallen and in what intensity.
光线穿过这些缝,然后在那边我们看到,光在屏幕上的落点及其亮度。
So, as we look further and further away, it takes longer and longer for the light to get from where it's emitted to here and we can actually see backwards in time.
因此，当我们观测的距离越远，光线传播到那里花费的时间也越长。因此我们能够看到时光倒流。
I want to say in particular that we can see the light of Asia's rise on the horizon. A dream long kept alive by the Asians is coming true.
我尤其要说的是，亚洲崛起的曙光已经照耀在东方的地平线上，这是亚洲人多少年来梦寐以求的时刻。
Planck detects light that we can't see with our eyes — light with low frequencies ranging from 30 to 857 gigahertz.
普朗克探测到的光波-低频范围从30 - 857千赫-是我们肉眼无法观察到的。
We see everything from paved and unpaved roads, light pollution, railways, electricity transmission lines.
我们可以从铺好的柏油路、或是未铺好的道路、光污染、铁路、输电线路看出所有的事情。
Now, over the past few years, some of us had begun to believe that we could see a bright light forming at the end of that confused and heterogeneous tunnel.
过去那混乱的几年之后，现在我们中的有些人已经开始相信，在经历了那么长时间混乱而无序的隧道之后终于看到曙光了。
Astronomers and scientists think that a black hole is a region of space (not a thing) into which matter has fallen and from which nothing can escape - not even light. So we can't see a black hole.
天文学家和科学家们认为黑洞是个空间区域，物体会掉进去，而没有物体能从中逃逸出来——即使是光也不能，所以我们看不到黑洞。
On the tiny blue planet we see from space, the light side of the force is clean, green and renewable.
从宇宙中看，在这个小小的蓝色星球上，原力明亮的一面是洁净的、绿色的、可再生的。
If astronomers could observe metallicity gradients in spiral galaxies billions of light-years away, we could see how steep the gradients were billions of years ago and thus how they change over time.
如果天文学家能够观测到十亿光年外的螺旋星云的金属丰度梯度，我们就可以知道亿万年之前的梯度有多大，因此也就可以知道它是如何随时间变化的。
Because the universe has a finite age (~ 13.7 billion years) we can only see a finite distance out into space: ~ 13.7 billion light years.
由于宇宙有一个有限的年龄(约等于13.7亿年)，我们只能看到有限的空间：半径约等于13.7亿光年。
As much as we deride competition in many educational circles, most of the students I have met see competition in a positive light.
在许多的教育圈子，我们对竞赛嗤之以鼻，但我碰到的大多数学生以积极正面的态度看待竞赛。
We often see reports in newspapers and scientific journals that refer to distances of tens, to hundreds to millions — even billions — of light-years.
我们经常在新闻和科学杂志里看到报道，它涉及数以万的，百万的——甚至十亿光年的距离。
The matter we can see makes up just 17% of matter in the Universe; the remaining 83% is "dark", meaning it does not reflect or emit detectable light.
人类可见的物质只占到整个宇宙总物质的17%，剩下的83%是所谓“暗的”，意味着它们不会释出或反射可测光。
We see that your firm specializes in light industrial goods, and we are willing to establish business relationship with you.
得知贵公司专门经营轻工业品，我们愿意与贵公司建立业务关系。
We see that your firm specializes in light industrial goods, and we are willing to establish business relationship with you.
得知贵公司专门经营轻工业品，我们愿意与贵公司建立业务关系。
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