对远程教育学科定位问题、交互影响距离理论也应该有新的认识。

In addition, we should have new understanding to the orientation of discipline and the theory of transactional distance.

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其中，时间维度方面，生命时间哲学、时间经济学、时间地理学和城市时问距离理论是研究城市休闲时间有关的重要理论。

The lifetime philosophy, the time economic, the time geography and the city time-space rationale are the main theories of the time dimension aspects.

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这基于这样的理论，即近距离，非键相互作用是排斥的，即立体应变。

This is based on the theory that close-range, nonbonded interactions are repulsive, i.e. Steric strain.

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