If you are looking up at the sky on a clear night and you see a sudden flash of light, it is probably a shooting star!

如果你在晴朗的夜晚仰望天空，突然看到一道闪光，那可能是颗流星！

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I will turn up the light, and then you can see for yourself.

我把灯调亮，然后，你自己看吧。

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Visible light consists of different colors or wavelengths, which together make up what's called spectrum, a band of colors, like you see in a rainbow.

可见光由不同的颜色或波长组成，它们共同组成了所谓的光谱（一段颜色），就像你在彩虹中看到的那样。

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And you know, they are really nice when they light up at night. "One couple we talked to was visiting from France.

VOA: special.2010.05.07

If I went on and told you what the different incident light was, and what the electrons were ejected with, and then you could look up the ionization energy for the particular different elements, you should be able to actually determine exactly which element it is, but just with the information given, we can only narrow it down to these choices here.

如果我继续告诉大家入射光源是什么，出射电子的动能是多少，那么你可以去查一查,以上各个元素的电离能，这样你就应该能确定,这个元素到底是哪个，但是只凭题目中的信息，我们只能把范围缩小至以上几种元素。

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Students would see my light on in my office and say, "Oh that's great Master Brownell, you stayed up all night just like we did working," but of course we were on different schedules.

学生看到我办公室的灯亮着就说,"伟大的布朗奈尔院长,你也和我们一样通宵工作呀",但显然,我们的作息表不一样

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"When you make it easy on them, they're going to light you up, " New York forward Matt Martin said.

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But you don't quite ever grasp how really lovely it is until you see it happen and you see the kids light up and you see how excited they are.

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If you wanted all five of the modes to run on a wash, then all five lights would light up, if you only wanted three modes to run, then only three lights would light up.

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