名词
中文翻译：碘环
同义词：
['iodide ring', 'iodine ring']
例句：
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1.The iodine ring on the surface of the crystal is very clear.
晶体表面的碘环非常清晰。
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2.The iodine ring was used to detect the presence of heavy metals in the sample.
碘环用于检测样本中重金属的存在。
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3. The iodine ring was found to be useful in the analysis of organic compounds.
碘环在有机化合物的分析中被发现是有用的。