{
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    "version": 1,
    "lesson_title": "Lesson 11 听力练习",
    "course_key": "building_strong_english_foundations",
    "audio_policy": {
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            "title": "Part 01",
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            "title": "Part 02",
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    "generated_at": "2026-08-11T17:11:02+00:00"
}