One hand, from extremely serious shortage to surplus on Market, from extreme high to very low level on profits, from simple single to variety on products, it changes widely and fast.

一方面，市场从供不应求到产能过剩，行业利润从极度暴利到严重微利，产品从简单单一到丰富多样，变化波及面广、速度快。

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After several years of cruel competition, the PHS market, which used to be fast growing, suffered huge changes and the products turn to be decreasing.

经过近几年残酷的市场竞争，小灵通通信市场变动较大，从一个高速成长的产品转变为持续下滑。

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Market demands change fast, the production technology changes with each passing day, the life cycle of products is shorter and shorter, and the competition among enterprises become more intense.

市场需求瞬息万变、生产技术日新月异，产品生命周期日益缩短，企业之间的竞争愈发激烈。

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First, the market landscape changes very fast, driven by imitation, competition from alternative products, and market saturation.

FORBES: One Question Every High Technology CEO Should Ask Every Day

That makes them a dicey proposition in a fast-moving energy market like Britain's, where changes in spot power prices can transform a profitable plant into a loss-making one overnight.

ECONOMIST: Energy