短语词组短语complex vector root locus 复矢量根轨迹complex x root 复数根Repeated Complex Root 复重根Root Complex 根联合体;根组件;精研祛斑复方;净斑阻断修复复方soil -plant root complex 土壤Root System Complex 根系综合体Root rot complex 根腐病复合症 返回 complex root