制造商必须使零售商店的店主相信，经销他的产品是有利可图的；他还必须吸引成千上万看不见的顾客从各地零售商店的店主那里购买他的产品。这种销售方法既需要商业广告，又需要消费广告。
【正确答案】：A manufacturer must convince storekeepers that it will be profitable for them to stock/sell the things/ products he manufactures , and he must induce thousands or millions of unseen people to buy his products from storekeepers in various places. This kind of selling calls for both trade advertising and consumer advertising
