n.銅；銅幣；警察；紫銅色；有紫銅色翅膀的小蝴蝶

vt.鍍銅

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。

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(mǎn)烏云的天空現(xiàn)出一種混沌的紫銅色。

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。

n.銅匠；銅器制造人