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  "title": "右侧足踝结构与运动教学窗",
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    "coordinateConvention": "Y up metres; anterior +Z; right foot medial +X",
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      "moving": "talus and all distal foot bones"
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      "moving": "all distal foot bones except talus"
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    "rangeMeaning": "Author-selected bounded demonstration controls, not normative clinical range or patient measurements.",
    "limitation": "Pivots and orthogonal axes are teaching approximations, not anatomically registered joint axes. The ankle complex has oblique, coupled multi-joint motions. No contact solver or clinical arthrokinematics is implemented."
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  "contentReferences": [
    {
      "title": "OpenStax Anatomy and Physiology 2e §9.5 Types of Body Movements",
      "url": "https://openstax.org/books/anatomy-and-physiology-2e/pages/9-5-types-of-body-movements",
      "scope": "Movement definitions paraphrased; no illustrations reused."
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    {
      "title": "OpenStax Anatomy and Physiology 2e §11.6 Appendicular Muscles of the Pelvic Girdle and Lower Limbs",
      "url": "https://openstax.org/books/anatomy-and-physiology-2e/pages/11-6-appendicular-muscles-of-the-pelvic-girdle-and-lower-limbs",
      "scope": "Broad lower-leg muscle actions paraphrased, not muscle force data."
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}