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
造句
用作名詞(n.)
Copper conducts electricity better than iron does. 銅的導(dǎo)電性比鐵強(qiáng)。
The shop sells copper vessels of all shapes. 這家商店出售各種形狀的銅器皿。
He polished up the old copper coins. 他把舊銅幣擦亮。
I gave him a few coppers. 我給了他幾個(gè)銅幣。
I know he is a plain-clothes copper. 我知道他是個(gè)便衣警察。
Her hair shone copper in the sunlight. 她的頭發(fā)在陽(yáng)光下閃著紫銅色。
The cloud-mussed sky turned a vague copper color. 堆滿烏云的天空現(xiàn)出一種混沌的紫銅色。
用作及物動(dòng)詞(vt.)
Zinc base die castings are always copper plated in cyanide baths. 鋅基合金的壓鑄件總是在氰化鍍液中鍍銅。
The development history of cyanide-free copper electroplating is briefly reviewed. 摘要簡(jiǎn)要回顧了無(wú)氰堿性鍍銅的發(fā)展歷史。