Some canopies have narrow strips of metal or wood to provide either sunlight or shade, depending on the position of the sun.

VOA: special.2011.08.09

It's magical.It's sorcery to take an ore and convert it to metal. It's magic. It still amazes me today.

非常神奇，采取矿石并将其转变为,金属非常神奇，我现在仍然很吃惊。

麻省理工公开课 - 固态化学导论课程节选

I used to listen to a lot of hip-hop music and heavy metal when I was younger.

我年轻的时候，我常常听一些嘻哈和重金属音乐。

What kind of实战 - SpeakingMax英语口语达人

In some cases,instead of a cast, a splint made of plastic or metal will be secured over the area to restrict movement.

VOA: special.2009.02.04

Sometimes it's easier actually not touch it to the metal, -- I should have- TA: It's hard to see if it's moving or not.

有时候它更容易不接触金属，我本应该-,助教：很难看到它是否移动了。

麻省理工公开课 - 化学原理课程节选

Then he used the plaster form as a guide to make the final statue out of bronze metal.

VOA: special.2010.05.31

That is what makes metal so fascinating, because metallic bonding allows the atoms to glide over one another without resulting in catastrophic failure.

所以这就使得金属具有了特别的性质，因为金属键使得原子可以,在彼此之间流动,而不会千万灾难性的后果。

麻省理工公开课 - 固态化学导论课程节选

The treadle pump is easy to build from bamboo or other wood and two metal cylinders with pistons.

VOA: special.2009.08.17

Due to an explosion, a metal pipe went through his head like so.

由于一场爆炸,一根钢管刺穿了他的脑袋,就像这样

耶鲁公开课 - 心理学导论课程节选

At last he did, he tied the boat to metal ring that was stuck in the rocks.

VOA: special.2010.05.08

It's made of strong metal, it's got very thin slits to be able to see straight ahead, covered up; everything else is covered up, a good one will cover your neck as well.

头盔是坚固的金属制成,正面有一条很细的开口能让士兵看到前方,左右两边都包住,剩下所有地方都包住,好一点的头盔甚至能保护颈部

耶鲁公开课 - 古希腊历史简介课程节选

Once again, he took off a metal band from his arm and gave it to me.

VOA: special.2010.07.31

Hi-diddily-ho, pedal-to-the-metal-o-philes.

嗨，邻居。

耶鲁公开课 - 公正课程节选

He slowly took off a metal band from his arm and held it out to me.

VOA: special.2010.07.17

So, we do this here for the photoelectric effect, and in terms of the photoelectric effect, what we know the important point is that the incoming photon has to be equal or greater in energy then the work function of the metal.

所以，我们做这个是为了说明，光电效应，在光电效应方面，我们知道的最重要的事情,就是入射的光子能量必须等于,或者大于金属的功函数。

麻省理工公开课 - 化学原理课程节选

Severe breaks may require an operation to hold the bone together with metal plates and screws.

VOA: special.2009.02.04

So, if we want to go from that stable state to that less stable state, we need to put in a certain amount of energy to our system, that difference between the free electron and the electron bound to the metal.

所以，如果我们想使电子,从稳态到达不够稳定的状态，我们需要引入一定数量的,能量到系统中，即自由电子和束缚于金属的,电子的能量差。

麻省理工公开课 - 化学原理课程节选

Or,he or she can place the hot glass on a metal table called a marver to shape the form by rolling it back and forth.

VOA: special.2009.09.16

All right. So please raise your hand now if you think there'll be sufficient energy to eject electrons from the metal surface?

好的，如果你们认为,有足够的能量从金属表面,射出电子请举手？

麻省理工公开课 - 化学原理课程节选

I had my head in and was about to open the lantern, when my finger slid on a piece of metal and made a noise.

VOA: special.2009.05.16

So, it works, I think it's just getting too much Sometimes it helps to not actually hit the metal, - just put it next to the -- there we go.

所以，它开始工作了，我认为它太多了,有时候它并不是,帮助轰击了金属，仅仅是把它拉近了。

麻省理工公开课 - 化学原理课程节选

Adair also developed special equipment made of bronze metal to help extinguish oil well fires.

VOA: special.2009.03.22

So, for example, we were talking about a threshold frequency as in a minimum frequency of light that you need in order to eject an electron from a metal surface.

举个例子来说，我们谈论的临界频率是,光从金属表面逐出一个电子,所需的最小频率。

麻省理工公开课 - 化学原理课程节选

These metal devices helped reinforce the blue jean cloth to make the pants stronger.

VOA: special.2009.12.18

And often, if you want to make a lot of it, you have to think about the thermodynamics of the system, how fast the reactions will go and kinetics, and then whether they'll go, the thermodynamics, and sometimes then you need to adjust the reactions, maybe use a transition metal to make it go better.

这种分子就不能正常工作，而且通常来说,如果你要大量生产一个东西,你必须考虑系统的热力学，反应速率和动力学,还有反应是否会发生，热力学，而且有时候你需要调整反应的发生。

麻省理工公开课 - 化学原理课程节选

He refuses. And now,the metal of the armor appears to be poisoning Iron Man.

VOA: special.2010.06.14

Yet, they wanted to get clean and so what device they used was to take oil, typically olive oil, spread it on themselves, then get a scrapper, a metal scrapper, and scrap off the oil with it what was underneath the oil.

当他们想要保持清洁时,他们所使用的东西就是油,通常是橄榄油,把橄榄油抹在身上,然后拿一个刮板,金属刮板,把污垢和油一起刮下来

耶鲁公开课 - 古希腊历史简介课程节选

And,showerheads made of plastic seemed to have higher bacteria levels than metal ones.

VOA: special.2009.10.13

And there is a relationship here, and that is that the number of photons absorbed by the metal are related to the number of electrons ejected from the metal. So, in this figure here what I'm actually showing is these little sunshines, which let's say are each one individual photon.

这里有一个关系是，被金属吸收的光子,和被金属逐出的电子是相关的,所以，我展示的这个图,是这些小太阳，我们这里代指每一个独立的光子。

麻省理工公开课 - 化学原理课程节选

The artist uses a fine sharp knife to cut through the metal.

VOA: special.2009.09.02