You then will awaken as radical Freedom, and sing those songs of radiant release, beam an infinity too obvious to see, and drink an ocean of delight.

这时你开始察觉那股基进的自由，而唱出解脱之歌，放出醒目的无限之光，饮下至乐之水。

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This gives you a little bit of an idea of just how many individual photons there are in a laser beam of light.

这让你对一束激光中有多少个光子有了一点概念。

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This gives you a little bit of an idea of just how many individual photons there are in a laser beam of light.

这让你对一束激光中有多少个光子有了一点概念。

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It is an electron beam. In the 1890s, the latter part of the 19th century a very fashionable word was "ray."

那是个电子束，在十九世纪九十年代，就是19世纪末,一个很时髦的词汇-“光线“

麻省理工公开课 - 固态化学导论课程节选

So this gives you a little bit of an idea of just how many individual photons there are in a laser beam of light. This is a huge number of photons.

这个给你们一点思路关于,一个激光束有多少独立的光子,这是一个巨大的光子数目。

麻省理工公开课 - 化学原理课程节选

And now we repeat the experiment, only this time we come with an electron beam.

现在来重复一下实验，仅在这次我们得到了电子束。

麻省理工公开课 - 固态化学导论课程节选

It works by scanning a laser beam across an object and manipulating the reflected light to produce an extremely narrow focal plane.

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According to the automaker, laser lighting can produce a forward beam with an intensity a thousand times greater than conventional LEDs, but with half the energy consumption.

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To create a hologram, such as those typically seen on credit cards, a laser beam is split into two (an object beam and a reference beam).

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