valence characterized by the sharing of electrons in a chemical compound; the number of pairs of electrons an atom can share
同义词：covalency
covalence详细解释
co.va.lence n.（名词）The number of electron pairs an atom can share with other atoms.共用电子对数，共价：一个原子与其他原子共用的电子的对数 【引伸】 cova.lency n.（名词）cova.lent adj.（形容词）cova.lently adv.（副词）
