content-based的用法和樣例：
例句
- The production release supports the use of event selectors that can be used to select events based on their contents.
產品發布版支持使用事件選擇器來基於內容選擇事件。 - Feature extraction is the foundation of audio classification, while audio classification is a key of content based audio retrieval.
摘要音頻特徵提取是音頻分類的基礎，而音頻分類又是基於內容的音頻檢索的關鍵。
