1. any of the bivalent metals (calcium or strontium or barium or magnesium). 任何二价金属（钙、锶、钡、镁）。
2. But bivalent and trivalent metal salts of the phosphoric acid had little effect on properties of iPP. 而二价的钙盐、镁盐、锌盐和三价的铝盐的成核效果不明显。
3. a hard ferromagnetic silver-white bivalent or trivalent metallic element; a trace element in plant and animal nutrition. 一种二价或三价金属元素，坚硬的银白色铁磁体，植物动物营养中的微量元素。
英英解释
adj.
1. having a valence of two or having two valences
2. used of homologous chromosomes associated in pairs in synapsis
