entities in mental space, but its deficiency prevents it from presenting dynamic process of discourse in one single model, thus producing a large amount of Deictic Space Models produced when representing the movement of a discourse entity. Hence, to visualize the positions of discourse entities and the spatial relations among them in one single mental model, the Context-deictic Space Model is proposed by projecting the context model onto the Deictic Space, which not only overcomes the deficits of above two models, but also utilizes their advantages to present the dynamic changes of the discourse entity in one single model.
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