N-UNCOUNT 金字塔式销售，传销（一件产品经由很多级转售价格逐渐升高，但最后一级只能以低于进价出售） Pyramid selling is a method of selling in which one person buys a supply of a particular product direct from the manufacturer and then sells it to a number of other people at an increased price. These people sell it on to others in a similar way, but eventually the final buyers are only able to sell the product for less than they paid for it. 金字塔式销售，传销（一件产品经由很多级转售价格逐渐升高，但最后一级只能以低于进价出售） [business]