New link element relation types.
新的link元素关系类型。
Objective To study on the relation between trace element in hair and hypertension.
目的探讨原发性高血压与头发中微量元素的关系。
Production-relations are the relation between each key element in social production.
生产关系是社会生产中各要素之间的关系。
Production-relations are the relation between each key element in social production.
生产关系是社会生产中各要素之间的关系。
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