human body trace element 人体微量元素
Many studies have demonstrated that the damage of large accumulation of manganese, as a body trace element, is expressed mainly in the nervous system.
大量研究证明，锰作为机体微量元素，堆积后的损伤主要表现于神经系统。
Iron is an indispensable trace element which is easily deficient in human body.
铁是人体必需的和易缺乏的微量元素。
Selenium is a required nutrition trace element for human body and animal.
硒是人畜必需的营养性微量元素。
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