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- He vainly tried to mark the defacing stain out. 他试图除去有损外观的污迹，但没有成功。
- I put the shirt in soapy water to soak out the stain. 我将衬衫浸在肥皂水里以去除污渍。
- I scrubbed hard at the stain to see if I could get it off. 我使劲擦这个污迹，看能不能将它去掉。
- I am afraid you must wash out this stain. 恐怕你必须洗掉这个污渍。
- The stain on his shirt is difficult to clean off. 他衬衣上的污点很难去除掉。
- The chemical symbol for copper is "Cu". 铜的化学符号是Cu。
- The stains have been washed away. 污点已被洗去。
- What color is copper sulphate solution? 硫酸铜溶液是什么颜色？
- How can I take out the ink stains from my blouse? 我衬衣上的墨水印怎么能洗掉？
- These stains won't come off, I'm afraid. 我看，这些污点去不掉。
- Those grease stains won't wash off. 这些油迹洗不掉。
- 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。
- I rubbed hard but the stain just wouldn't go. 我使劲擦也擦不掉那污迹。
- These ink stains won't come out (of my dress). (我的连衣裙上的)这些墨水点洗不掉。
- What color is copper sulfate solution? 硫酸铜溶液是什么颜色？
- These ink stains won't wash out. 这些墨迹洗不掉。
- 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
- Such a man is a stain to humanity. 这种人是人类的耻辱。
- Ornamental copper pans hung on the wall. 墙上挂着装饰性的铜盘。
