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420 个", "category": "text", "attachment_id": "", "order": 19, "duration": 1000000000, "created_at": "2024-07-25T01:37:45.948Z", "updated_at": "2024-07-25T01:37:45.948Z", "attachment": null }, { "id": 9004, "course_id": 517, "content": "fd8431e7-2ffc-4a20-87d9-7a4442d16608.mp3", "category": "audio", "attachment_id": "fd8431e7-2ffc-4a20-87d9-7a4442d16608", "order": 20, "duration": 27050, "created_at": "2024-07-25T01:37:45.948Z", "updated_at": "2024-07-25T01:38:40.044Z", "attachment": { "id": 56363, "attachment_id": "fd8431e7-2ffc-4a20-87d9-7a4442d16608", "name": "fd8431e7-2ffc-4a20-87d9-7a4442d16608.mp3", "thumb": "", "raw": "https://xuexi-courses-storage.firesbox.com/7000102069/replay/fd8431e7-2ffc-4a20-87d9-7a4442d16608.mp3", "size": 216429, "duration": 27050, "mime_type": "audio/mp3", "location": "aws_s3", "created_at": "2024-07-25T01:37:45.932Z", "updated_at": "2024-07-25T01:38:40Z", "url": 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