科学理论
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.. image:: /_static/images/box.jpg


实验科学理论层次认识

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 .. toctree::
    :maxdepth: 2

    psycho/index
   
 .. toctree::
    :maxdepth: 2

    physic/index

 .. toctree::
    :maxdepth: 2

    system/index