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- The chemical symbol for copper is "Cu". 铜的化学符号是Cu。
- What color is copper sulphate solution? 硫酸铜溶液是什么颜色？
- Copper and gold are both metals. 铜和金都是金属。
- Copper has less resistance than lead. 铜的电阻比铅的小。
- What color is copper sulfate solution? 硫酸铜溶液是什么颜色？
- extraneous copper 附加镀铜
- A copper coin formerly used in India and Pakistan. 安那旧时在印度和巴基斯坦使用的铜币
- Ornamental copper pans hung on the wall. 墙上挂着装饰性的铜盘。
- This mountain road leads to the copper mine. 这条山路通向那个铜矿。
- Brass is an alloy of copper and zinc. 黄铜是铜和锌的合金。
- We fuse copper and tin to make bronze. 我们把铜和锡熔制成青铜。
- Reductant from an extraneous source is introduced. 外来的还原剂被引进来。
- They will mine copper there in the valley. 他们将在那边的山谷开采铜矿。
- Brass is formed by the fusion of copper and zinc. 黄铜是由铜和锌熔合制成的。
- Copper conducts electricity better than iron does. 铜的导电性比铁强。
- Even his family had become extraneous to him. 甚至家庭对他也无足轻重。
- To remove extraneous matter from(the teeth). 剔除从（牙上）剔除外来物质
- We shall ignore factors extraneous to the problem. 我们应该撇开与此问题无直接联系的因素。
- The label has no extraneous blotches. 标签没有任何污点。
- Not mingled or diluted with extraneous matter;pure. 未掺杂的，无杂质的，纯净的
