Covo科沃COpref.共同；一起；联合abbr.公司（=company）abbr.郡；县（=county）abbr.指挥官（=Commanding Officer）covariance equivalence协方差等效covariant relationship协变关系co-citation indexing相互引文索引co-channel isolation同频道隔离coenogamete phenomenon新生现象Coelioxys spativentrisn.铲尾尖腹蜂co-electrodeposition共沉积coagulation air floats混凝气浮Coenotephria homophanan.褐波珂尺蛾co-extrusion molding共挤出成型