您要查找的是不是：
- Practices prove that: the key of protection of silver plating color variation lies in reducing silver ionization. 实验证明,防止银镀层变色的关键在于降低银的离子化。
- The craftsman plated copper with silver. 工匠给铜镀银。
- We refer to copper and silver as good conductors. 我们认为铜和银是良导体。
- Is it silver or copper that is the best conductor? 最好的导体是银还是铜?
- He wanted to plate copper with silver. 他想给铜容器镀银。
- Gilded silver, bronze, or copper. 镀金的银、青铜或铜
- Acid had pitted the surface of the silver. 酸把银器的表面腐蚀了。
- She wore a silver chain around her neck. 她脖子上戴着一条银项链。
- The chemical symbol for copper is "Cu". 铜的化学符号是Cu。
- They have some sterling silver cutlery. 他们有一些标准纯银餐具。
- He put the candle on the silver candlestick. 他把蜡烛放在银烛台上。
- What color is copper sulphate solution? 硫酸铜溶液是什么颜色？
- Workers are removing impurities from silver. 工人们正去除银中的杂质。
- Copper and gold are both metals. 铜和金都是金属。
- He found the chest to contain silver coins. 他发现那囗箱子装着银币。
- Copper has less resistance than lead. 铜的电阻比铅的小。
- She won a silver trophy for shooting. 她在射击比赛中获得银奖。
- The burglars made away with all our silver. 窃贼带着我们所有的银子逃走了。
- His black hair was threaded with silver. 他的黑发中夹杂着银发。
- What color is copper sulfate solution? 硫酸铜溶液是什么颜色？
