A one-cent copper coin could be exchanged for three copper coins.

当时一分铜可兑换三枚" 铜板" 。

The entire building is shielded in copper mesh.

整栋大厦都被铜丝网包围了。

A small pair of shoes with copper tips!

是一双小鞋子，鞋尖是铜的。

Unlike copper cables, which transmit electrical energy, fiber optic cables transmit light.

而同只能传输电能的铜线缆不同的是，光缆可以传输光。

Think of it as copper being a crossing guard.

你可以把铜想象成一个十字路口的警卫。

And copper is your answer here.

铜是今天这道题的答案。

And blue green came from copper.

蓝绿色来自于铜。

This wire is made of copper.

这条金属丝是铜制的。

Until about 1902, legal food preservatives included chemicals like formaldehyde, borax and copper sulfate.

在1902年以前合法的食品添加剂还包括甲醛，硼砂和硫酸铜。

The archeologists found some ancient copper coins in the tomb.

考古学家在坟墓中发现了一些古代的铜币。

Smoke contains tiny pieces of metals like lead and copper.

烟雾中含有微量金属，如铅和铜。

But how to protect the copper cables from the sea?

但是如何保护铜电缆不受海水的影响呢？

You've got brass or copper here on the heater.

我们看到炉子上挂有铜质的饰品。

" What we need is inside the cables – copper, " he says.

“我们需要的是充电线内部的——铜，”他说。

They let a massive coil of copper tubing make an opening.

他们用一大盘铜管制作一个通道。

You should never let your chutnee cool in a copper pan.

不要把酱放在铜制容器中冷却。

OK, now for number three you need rock salt or copper sulphate.

好的，第三个实验需要你准备石盐或硫酸铜。

That metal is tin, and a mixture of tin and copper is called bronze.

这种金属就是锡，而铜和锡的混合物就叫做青铜。

In a conductor like copper metal, electrons flow through the entire material.

在如同金属铜一类的导体中，电子会流过整块金属。

They placed a long copper pipe in the middle of the room.

屋子的中间放置着一根长铜管。