音标：['kɒpә] ；柯林斯词典等级：2 级；

n. 铜, 警察
[化] 铜Cu

n. a ductile malleable reddish-brown corrosion-resistant diamagnetic metallic element; occurs in various minerals but is the only metal that occurs abundantly in large masses; used as an electrical and thermal conductor
n. a copper penny
n. a reddish-brown color resembling the color of polished copper
n. any of various small butterflies of the family Lycaenidae having coppery wings

词型变化：名词复数形式 : coppers ; 现在分词 : coppering ; 过去式 : coppered ; 第三人称单数 : coppers ; 过去分词 : coppered
考试类型：[四级/六级/考研/托福]

词性分布：

名词95%

形容词5%

copper的用法和样例：

例句

用作名词(n.)

Copper conducts electricity better than iron does.铜的导电性比铁强。
The shop sells copper vessels of all shapes.这家商店出售各种形状的铜器皿。
He polished up the old copper coins.他把旧铜币擦亮。
I gave him a few coppers.我给了他几个铜币。
I know he is a plain-clothes copper.我知道他是个便衣警察。
Her hair shone copper in the sunlight.她的头发在阳光下闪着紫铜色。
The cloud-mussed sky turned a vague copper color.堆满乌云的天空现出一种混沌的紫铜色。

用作及物动词(vt.)

Zinc base die castings are always copper plated in cyanide baths.锌基合金的压铸件总是在氰化镀液中镀铜。
The development history of cyanide-free copper electroplating is briefly reviewed.摘要简要回顾了无氰碱性镀铜的发展历史。

常见句型

用作名词(n.)

Copper conducts electricity well.铜是电的良导体。
Have you any coppers in your change?你的零钱里有铜币吗?
This store sells all kinds of copper.这家商店出售各种铜制品。

词汇搭配

用作名词 (n.)

动词+～

ask for〔collect〕 coppers要〔收集〕铜币
cast〔toss〕 coppers扔铜币
mine copper开发铜矿

形容词+～

greasy copper铜臭

～+名词

copper manufactures铜制品
copper sulphate硫酸铜
copper wire铜丝

介词+～

four pence in coppers四便士铜币
fine work on copper铜币上的美术精品

【近义词】

penny便士
cent分
red cent一分钱
pence便士
P字母P
twopence两便士
tuppence两便士
halfpenny半便士硬币
bawbee半辨士
fuzz<非正式> 细毛...
CU闭合(=Close-Up...
bull公牛
cop纺锤状线团、管纱...
pig猪
copper color铜色

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bankers' draughts