The force-dynamics which is a type of image schema developed from mechanics to analyse linguistic structures accounts for the force phenomenon in spatial perception and semantic structures.
动力意象是根据力学原理形成的一种结构分析图式，它能解释空间感知与语义结构的力学现象。
To sum up, the sense formation and extension of the spatial preposition is motivated by the image schema, which also provides the root and prime power for metonymic and metaphorical extensions.
简言之，空间介词义项的形成和扩展以意象图式为源泉，意象图式为转喻和隐喻提供了基础和原动力。
The theoretical basis is that metaphor is an important means of experience the world and spatial concept is mainly expressed by means of metaphor——spatial metaphor which is a kind of image schema.
其理论前提是：比喻是人类认识世界的重要手段； 空间概念主要是通过隐喻表达的，即空间隐喻。
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