| 词汇 | MP4 |
| 释义 | MP4BrE /ˌem piː ˈfɔː(r)/ NAmE /ˌem piː ˈfɔːr/ noun [U , C ]a method of reducing the size of a computer file containing sound and images ; a file that is reduced in size in this way * MP4 技术（一种影音压缩技术）；MP4 文件 |
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