n.铜；铜币；警察；紫铜色；有紫铜色翅膀的小蝴蝶
vt.镀铜
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。
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。
n.铜匠；铜器制造人
