copper造句
We tried to grow some
copper sulphate crystals with our children.
我们想跟孩子们一起制作硫酸铜晶体。
El Salvador produces 100,000 tons of refined
copper annually.
萨尔瓦多每年生产10万吨纯铜。
He makes decorative vessels in
copper, stainless steel and silver.
他用铜、不锈钢和银制造装饰性器皿。