名词
中文翻译：纯净的
同义词：
['purity', 'pure substance']
例句：
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1.The pristane sample was found to be free of any impurities.
纯净样品未发现任何杂质。
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2. The pristane is a rare and valuable resource in the field of chemistry.
纯净物在化学领域是一种稀有且宝贵的资源。
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3.The pristane compound has been shown to have anti-cancer properties.
纯净化合物已被证明具有抗癌性质。