Selenium content is so varied in different environment that the blood selenium contents differ from area.
硒在环境中的分布有很大差异，因而人体的全血硒水平存在地区性差异。
The blood selenium content can reflect the present selenium level of human body. It has been the standard to apprise the selenium state of human.
血中硒含量能最确切地反映人体当前的硒水平，血硒水平已广泛用作评价人体硒状态的指标。
Selenium content in wool is closely related to erytlirocyte glutathione peroxidase activity in blood of sheep .
羊毛硒含量与羊血谷胱甘肽过氧化物酶活性显著相关。
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