In the study system, lack of the user cognitive models and communication channels in product user interface design research.

在研究体系上，对于产品设计的用户认知模型和传达途径缺少全面的研究和阐述。

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From the reality perspective, the company also needed to use the product user interface design to the fierce competition in the market to achieve competitive advantage.

从现实角度来看，企业界也急需产品用户界面的相关研究，以期在激烈的市场竞争中获得竞争优势。

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Well, because for users (and clients), the user interface is the product.

因为对于用户和客户来说，用户界面就是产品本身。

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Dodsworth has been lucky, though, because Twitter has yet to introduce a particularly good user-interface product.

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