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
a copper penny
uncomplimentary terms for a policeman
a reddish-brown color resembling the color of polished copper
any of various small butterflies of the family Lycaenidae having coppery wings
Verb:
coat with a layer of copper
双语例句
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。
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。
