Essential Trace Element 必需微量元素
essential trace element detail 必需微量元素
essential trace element including 人体必需微量元素
essential trace element of human 人体必需微量元素
Selenium is a trace element essential to human body.
硒是人体必需微量元素。
Chromium is an essential trace element for organism and the essential ingredient to keep GTF's activity.
铬是人和动物所必需的微量元素，是GTF(葡萄糖耐量因子)的必要活性成分。
The selenium is the human and the animal maintenance organism health essential trace element.
硒是人和动物维持机体健康必需的微量元素。
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