Dolan C.and J.Humphrey,Value chains and upgrading:The impact of UK retailers on the fresh fruit and vegetables industry in Africa,Journsl of Development Studies,2000(37).是什么意思_Dolan C.and J.Humphrey,Value chains and upgrading:The impact of UK retailers on the fresh fruit and vegetables industry in Africa,Journsl of Development Studies,2000(37).在线翻译_英语_读音_用法_例句