市场营销理论有谓Product Line Extension（产品线延伸），海洋公园卖精品及餐饮，可占盈利四成。球场除租场费外，亦可售卖衍生商品，赚取更多钞票。
双语例句
1
The productlineextension is one of important rivalry instruments for the multi-product firms, also a study focus of new empirical industrial organization.
产品线扩展是多产品企业的主要竞争手段之一，也是新实证主义产业组织理论研究的重点内容。
2
When a company introduces an additional item with a new flavor, form, color, or package size in a given product category and under the same brand name, it is called a lineextension.