MP3
noun
1- a means of compressing a sound sequence into a very small file, used as a way of downloading audio files from the Internet.MP3（一种数字音频压缩格式, 可将音频压缩为极小的文件, 用于从网上下载音频文件）。
1.1
- a file in this format.MP3文件：
as modifier an MP3 player.一个MP3播放器。
词源
1990s: from MPEG +Audio Layer-3.