copper

复数：coppers

1. [U]铜 a metal with a color between brown and red
2. [C]铜币 a coin of low value made of copper

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

• greasy copper铜臭

• copper manufactures铜制品
• copper sulphate硫酸铜
• copper wire铜丝

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

copper mine铜矿

copper alloy铜合金

copper wire铜线

copper ore铜矿

copper tube铜管

copper powder[冶]铜粉

copper clad铜箔；包铜的

copper foil铜箔

copper plating镀铜；电镀铜；红铜

copper sulfate硫酸铜

pure copper纯铜，红铜

jiangxi copper江西铜业（铜生产商）

copper plate铜板

copper concentrate铜精矿

copper pipe铜管

copper oxide[医]氧化铜

electrolytic copper电解铜

copper content含铜量

red copper紫铜

copper strip铜带；铜条

1. Copper conducts electricity better than iron does.
   铜的导电性比铁强。
2. The shop sells copper vessels of all shapes.
   这家商店出售各种形状的铜器皿。
3. He polished up the old copper coins.
   他把旧铜币擦亮。
4. I gave him a few coppers.
   我给了他几个铜币。
5. I know he is a plain-clothes copper.
   我知道他是个便衣警察。
6. Her hair shone copper in the sunlight.
   她的头发在阳光下闪着紫铜色。
7. 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。

1. 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。
2. 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。