"Instead of having light travel in air, it travels within the lens," he says.
Bathiche解释说：“光线在这种镜片的内部传播，而不像普通镜片那样在空气中传播（和光纤非常类似）。
So fast does the light travel that it is difficult for us to imagine its speed.
光传播的很快我们无法测量其速度。
I applaud Rolf for pushing the boundaries of light travel, and look forward to following his journey.
我赞成Rolf推崇的跨越界限的轻装旅行，期待他下一次的旅行。
The light is broken into colors because different colors of light travel at different speeds in water.
因为光的不同颜色在水里以不同的速度传播，所以光分解成各种颜色。
I’ve tested my new system of “extreme light travel” on a few trips now; and I’m happy to say, it’s worked like a dream!
这种“轻装出行”我在一些旅行中已经试过了；可以很高兴地说，这简直和做梦一样！
I can ask myself now the question, how far does electromagnetic radiation, how far does light travel in the time of one period capital t?
现在我们能问，电磁辐射，有多远，光在一个周期T内，行进了多远？
However, there are still no forecasts for when faster-than-light travel will be available, or when human cloning will be perfected, or when time travel will be possible.
然而，何时能够进行超光速旅行，何时人类克隆技术能够完善，何时时间旅行可以成为可能，他仍未作出预告。
Still, John Hopkins University radiology professor William Edelstein made science headlines in 2010 with his concerns about the radiation risks of faster-than-light travel.
尽管如此，霍普金斯大学放射学教授WilliamEdelstein在2010自然杂志的头条登了自己对超光速旅行辐射危险的看法。
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 nonlinear relation between light travel distance and measured displacement is (deduced) by vector coordinate transforms, and their analytic and numerical results are given.
应用矢量坐标变换的方法理论推导了在大量程范围内测量位移与光程差的非线性关系，给出了解析解与数值解。
It would be good to be able to travel light, but I end up taking too many clothes.
能够轻装旅行再好不过，但我最终还是带了太多衣服。
It weighted only 180 grams and required very little storage space, making it perfect for anyone wishing to travel light.
它只有180克，几乎不占用储存空间，非常适合想轻装旅行的人。
Today people and goods travel by jet aircraft and fast ships, and information is transmitted at the speed of light over the Internet.
人和货物通过喷气式飞机和快船来流动，而信息是通过互联网以光的速度传送。
这些天我“轻装上阵”。
Even if ET has mastered building a rocket that can travel at the speed of light, he may be lying dead inside a weakened craft .
即使外星人已经掌握了制造一枚能以光速飞行的火箭的技术，他也可能死在了一架飞船里。
I usually answered that I'd always liked to travel light, and that going without any bags at all sounded like a fun challenge.
我常常这样回答，我喜欢轻便的旅行，所以把不带行李去旅行当作对自己的有趣的挑战。
Some of this light would then travel back to the door and be reflected into the camera.
其中一些光会向门这个方向反射回来并又被反射回相机中。
It is impossible to travel faster than the speed of light, and certainly not desirable, as one's hat keeps blowing off.
不可能旅行得比光速更快，当然也不希望这样，因为你的帽子老是会被吹掉。
To travel light, I tried to avoid packing anything heavy, but one weighty item I always carried with me — a guidebook.
为了轻装旅行，我总是尽量不带重的东西，但有一样有分量的东西我总是带在身边，那就是旅游手册。
Because nothing can theoretically travel faster than the speed of light, nothing escapes once it's passed the event horizon.
因为理论上没有任何物体的速度会快过光速，所以一旦进入视界，任何物体都不能逃离。
But light can also travel at a more leisurely pace, slowed, for example, by air or water.
但是光同样可以以一种稍缓的速度行驶，比如它会因为在空气中或水中而被减慢速度。
Some of this light would then travel back to the door and be reflected into the camera.That much is basic optics.
它不记录直接反射回来的光线，而是记录下在进入相机前被反射过多次的光。
But at that time, the light pulses could travel only about 20 meters through the glass fibers before 99 percent of the light had dissipated.
但是在那个时候，光脉冲在玻璃光纤中只能穿行20米，99%的光都被损耗了。
Although previous studies have found that the "group velocity" of light can travel faster than c, the "signal velocity" -the speed at which information travels -cannot.
尽管先前的研究已经证实，光的“群速度”可以超越光速c，而“信号传播速度”——光携带的信息的传播速度——不能超越光速。
If you can travel 36 light-years-roughly 212 trillion miles-to a new planet discovered by astronomers, you might just be in luck.
假如您能旅行36光年，或者大约212万亿英里，到天文学家发现的一棵新行星上去，您一定会走运的。
If you can travel 36 light-years - roughly 212 trillion miles - to a new planet discovered by astronomers, you might just be in luck.
假如您能旅行36光年，或者大约212万亿英里，到天文学家发现的一棵新行星上去，您一定会走运的。
If you can travel 36 light-years - roughly 212 trillion miles - to a new planet discovered by astronomers, you might just be in luck.
假如您能旅行36光年，或者大约212万亿英里，到天文学家发现的一棵新行星上去，您一定会走运的。
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