商业橱窗具有宣传商品的基本功能；
Trade display windows have the basic function of giving publicity to the commodity .
它的基本功能是区别商品或服务的来源。
Its basic function is to distinguish goods or services sources.
市场作为商品交换的方式，其基本功能就是要实现商品的等价交换。
As a way of Commodity Exchange, the function of the market is to fulfill the equal exchange of commodity.
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