source credibility 信息来源的可信度source 广告信息来源sources of data 数据来源sources of new-product ideas 新产品创意来源speciality goods 特殊品speciality retailers 专营零售商speciality stores 专营商店specialization 专门化spokesperson
source credibility 信息来源的可信度source 广告信息来源sources of data 数据来源sources of new-product ideas 新产品创意来源speciality goods 特殊品speciality retailers 专营零售商speciality stores 专营商店specialization 专门化spokesperson