[] () the activity of adding new products to an existing range that are higher or lower in price, in order to attract a different group of customers产品线延伸（为吸引不同的顾客群，在现有产品线上增加较高价格或较低价格的新产品）◆For the luxury car manufacturer, line stretching means producing a car for the middle range of the market.对豪华汽车制造商而言，产品线延伸意味着为中档市场开发一种汽车。