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Copper is one of the essential microelements in human.
铜是人体重要的必需微量元素之一。
youdao
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Iodine is one of essential microelements for people and animal.
碘是人和动物必需的微量元素之一。
youdao
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Iodine is one of essential microelements for people and animal.
碘是人和动物必需的微量元素之一。
youdao