{
  "title": "Sample Sentence Book With Units",
  "category": "Other",
  "description": "Sentence-level JSON sample",
  "units": [
    {
      "title": "Unit 1 Daily",
      "description": "Daily communication",
      "items": [
        {
          "text": "Could you repeat that, please?",
          "definition": "A polite request for repetition",
          "translations": {
            "en": "A polite request for repetition",
            "zh-CN": "qing zai shuo yi bian"
          },
          "time_start": 0,
          "time_end": 2.85,
          "audio_us": "https://example.com/audio/repeat-us.mp3",
          "audio_uk": "https://example.com/audio/repeat-uk.mp3"
        },
        {
          "text": "I have been practicing listening every morning.",
          "definition": "Habit sentence",
          "translations": {
            "en": "Habit sentence"
          }
        }
      ]
    },
    {
      "title": "Unit 2 Work",
      "items": [
        {
          "text": "Let's schedule a follow-up meeting next week.",
          "definition": "Workplace sentence"
        }
      ]
    }
  ]
}