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And the team says changes in time spent in light or dark environments influences eating habits.
VOA: special.2010.12.21
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And the Aristotelian view held for a long time, but eventually it started to crumble in the light of more data.
而亚里士多德的观点在很长时间里得到了认同，但最终还是崩溃了,在越来越多的数据面前。
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No one, until this time, had suggested that a system would be subjected to quantization except for light.
在他之前，还没有人提出过,除光系统外的量子化系统。
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Their appearance changes endlessly with the light,the time of year, and the weather.
VOA: special.2009.10.07
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OK. In the length of time it takes for the light to get from that bulb to the table, this machine processes two operations.
好，在灯光从灯泡到,桌子的这段时间内，电脑已经进行了两次运算了。
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"His time in court and his problems didn't hold a light to the good things he did.
VOA: standard.2009.06.28
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It'll still likely get stuck in that spot, but we'll just show you one more time the effects of the UV light, and actually we'll throw in an extra trick here, too.
它仍然像是在那点卡住了，但是我们还是会再展示一次,紫外光源的效应，事实上，我们也会引入一个新的技巧。
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A gig is 10 to the 9, so it does two operations in the length of time it takes light to get from one foot off the table down to the table. That's amazing.
因此光行进一英尺的,时间内电脑可以,进行两次基本运算,这太神奇了。
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And the reason is, and this will come up on the problems and a lot of students end up using this equation, which is why I want to head it off and mention it ahead of time, we can't use an equation because this equation is very specific for light.
原因是，很多同学在解题时,都会用这个方程，所以我要,事先提醒你们一下,我们不能用这个方程，因为它只对光是用。
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Alright. So, since we have these terms defined, we know the frequency and the wavelength, it turns out we can also think about the speed of the wave, and specifically of a light wave, and speed and is just equal to the distance that's traveled divided by the time the elapsed.
好了，我们已经定义了，这些术语，我们知道了，频率和波长，现在可以来考虑,波的速度了，特别是光波的速度，速度等于它走过的距离,除以所用的时间，因为我们。
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c We know it's very specific for light because in this equation is c, the speed of light. So any time you go to use this equation, if you're trying to use it for an electron, just ask yourself first, does an electron travel at the speed of light?
我们知道它只对光适用是因为在这个方程里有,光速，所以下次你们用这个方程前，如果你们要把它用到一个电子上，先问问你自己，电子的运动速度是光速吗？
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