公共英语PETS4写作精选短语35
发布时间：2013/8/9 20:44:44 来源：城市网学院 编辑：admin
product life cycle
the marketing concept of a product having a natural period ranging from its introduction and rise in sales to its sales decline and expiration when customers purchase newer alternative products
xue.netple:
Because the #puter game industry changes so rapidly, the product life cycle of a popular #puter game may be only 18 months or less.
