1. Polyvalent Metal Hydroxyl Complexes. 多价金属羟基络合物；
2. A new calculating model was derived from the relation of absolute hardness to the radii of polyvalent ions. 从绝对硬度与离子半径的关系导出一个高价离子电子亲合能的计算模型。
3. Major treatment methods for arsenic include sulfide precipitation, or complexation with polyvalent heavy metals. 砷的主要处理方法有硫化物沉淀法，或与多价重金属络合。
英英解释
adj.
1. containing several antibodies each capable of counteracting a specific antigen
2. having more than one valence, or having a valence of 3 or higher
