It is bigger even than the Princess Lenore's room and it is made of hot copper, nobody can touch it.

VOA: special.2009.03.28

So it looks like most of you got that the electron configuration that we're writing here is for copper.

看来大多数人,都看出了,这是铜原子的电子排布。

麻省理工公开课 - 化学原理课程节选

They got this name because they wore on their coats a copper penny with the head of an Indian.

VOA: special.2009.10.22

There is also an image of a bell inside a copper-colored inkwell on the front of the note.

VOA: special.2010.11.15

Bartholdi decided to make a copper statue in the image of a woman -- Lady Liberty.

VOA: special.2010.05.06

They got the name because they wore a copper penny showing the head of an Indian.

VOA: special.2009.10.15

They wore on their coats a copper penny showing the head of a Native American Indian.

VOA: special.2009.10.29

Before it went into effect some economists predicted the trade agreement would increase sales of Indonesian commodities such as palm oil,copper,and rubber, but would hurt low-end manufacturers.

VOA: standard.2010.05.13

The company's output of iron ore, as well as copper, zinc and nickel, surged in the last three months of 2009 because of strong demand from Chinese carmakers and construction companies.

VOA: standard.2010.01.21