{
  "title": "Sample Word Book With Units",
  "category": "TOEFL",
  "description": "Explicit unit JSON sample",
  "units": [
    {
      "title": "Unit 1 Basics",
      "description": "Core starter vocabulary",
      "full_audio_us": "https://example.com/audio/unit1-us.mp3",
      "full_audio_uk": "https://example.com/audio/unit1-uk.mp3",
      "items": [
        {
          "word": "analyze",
          "definition": "to examine in detail",
          "translations": {
            "en": "to examine in detail",
            "zh-CN": "fen xi"
          },
          "audio_us": "https://example.com/audio/analyze-us.mp3",
          "audio_uk": "https://example.com/audio/analyze-uk.mp3"
        },
        {
          "text": "allocate",
          "userDefinition": "to distribute resources",
          "translations": {
            "en": "to distribute resources"
          }
        }
      ]
    },
    {
      "title": "Unit 2 Advanced",
      "items": [
        {
          "word": "mitigate",
          "definition": "to make less severe"
        }
      ]
    }
  ]
}