Product Life Cycle: The four stages that a new product is thought to go through from birth to death: introduction, growth, maturity, and decline. Controversy surrounds whether products go through this cycle in any predictable way.
产品生命周期:新产品从出现到消失有四个阶段:引入期、成长期、成熟期和衰退期。但存在的争议是这个循环的方式是否可预测。
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