名词
中文翻译：格雷氏碘染剂
同义词：
["Gram's iodine", "Gram's iodide"]
例句：
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1.The stain on the table is due to the spilled coffee.
桌子上的污渍是由于咖啡洒了。
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2.The stain on the shirt was caused by a chemical reaction.
衬衫上的污渍是由化学反应引起的。
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3. The stain on the carpet was difficult to remove.
地毯上的污渍很难去除。