原因是：零售商们身处品牌差别化的全面竞争中，要从其他的竞争者中脱颖而出成为唯一的商店品牌身份，同时他们需要相应厂商的帮助。

The reason: retailers are in an all-out war to differentiate their brands—as unique store identities—from their competitors and they are demanding help from specific vendors.

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互相竞争的零售商越相似和离的越近，对他们服务差别化要求就越高。

The more alike competing retailers are and the closer they are geographically, the greater will be the differences in servicing requirements.

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产品差别化是市场竞争中常见的战略选择之一。

Product differentiation is one of the common strategic choices in the market competition.

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