Copper is one of the essential microelements in human.
铜是人体重要的必需微量元素之一。
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。
Zinc is one of the necessary nutrition microelements for human body.
微量元素锌是人体所必需的营养元素之一。
Zinc is one of the necessary nutrition microelements for human body.
微量元素锌是人体所必需的营养元素之一。
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