The product line extension 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。

youdao

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 line extension.

当公司介绍一个另外的项目以新味道，形式，颜色，或包裹大小在一个指定的产品类别和以同样名牌，这称线性延伸。

youdao

Of course, if you are working on a minor product line extension or something familiar, you may succeed.

FORBES: The Innovator��s Paradox