The differences of the consumer demand have resulted in the variety of the same sort of the commodities, but the best allocation scheme is not for the cluster that has the most consumers all the time.
现今市场上，消费者需求的差异决定了同种商品市场上产品的多样化，然而目标顾客群最大的营销方案未必是市场资源的最优配置方案。
Value-added tax is levied on the production and allocation of philately commodities.
集邮商品的生产、调拨征收增值税。
Value-added tax is levied on the production and allocation of philately commodities.
集邮商品的生产、调拨征收增值税。
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