Some artists like this process because they can draw on the metal as easily as if they were using a writing pen.

VOA: special.2009.09.02

Those are the familiar and empirical objects that we can see, pieces of paper, bodies, pieces of chalk, bars of metal.

那就是我们能看见的,熟悉的已知的物体，纸，身体，粉笔，金属棒。

耶鲁公开课 - 死亡课程节选

Lastly, up here, is a picture of a much smaller device, this is actually an artificial heart valve that is made of plastics and metal and can replace the valve inside your heart.

最后,在上面这里,这张图片是一个相对较小的装置,这实际上是一个人工心脏瓣膜,由塑料和金属制成,可以取代人的心脏瓣膜

耶鲁公开课 - 生物医学工程探索课程节选

A book drop is the small metal door in the wall of the building where people can return books when the library is closed.

VOA: special.2009.02.23

that's one way to think about it, and there's also another way, and this is the way that your book presents it. If you, in fact, have two of the same atom right next to each other, let's say you have a crystal, or let's say you're talking about a metal, what you can do is just look at the distance between the two nuclei, and split that in 1/2, and take the atomic radius that way.

这只是一种定义的思路，另外还有其它方法，也就是你们课本上的方法，如果你，事实上，有两个相同的原子彼此靠在一起，比如说你有一个晶体，或者说你讨论的是一个金属，你所要做的就是,看看这两个原子核之间的距离，然后将距离除以二，就得到了这个原子的半径。

麻省理工公开课 - 化学原理课程节选

Metal detectors cannot be used in many cases because landmines can be made of non-metal materials.

VOA: special.2010.05.03

The artist can shape the hot glass using metal tools such as jacks, tweezers and shears.

VOA: special.2009.09.16

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

There are several kinds of metal sheets that can be used for the collector.

VOA: special.2009.04.20

Cyrus covers a song by the metal band Poison on "Can't Be Tamed."

VOA: special.2010.08.06

But in souvenir photos of those days, more than a few metal flasks, no doubt containing something stronger than Bubble-Up, can be seen on the floor beneath the tables.

VOA: standard.2010.02.25

These replacement joints can be made of combinations of metal alloys, plastic and ceramic, but new research shows that it might be possible to regenerate damaged joints using a patient's own stem cells.

VOA: standard.2010.08.11