最后，按顺序的 sort 和 uniq 确保了重复的专辑名只打印一次。

Finally, sort and uniq in sequence ensure that repeated album names will be printed only once.

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而在音乐实体识别方面的研究很少，涉及到中文歌曲名、专辑名识别的更少。

But the research on Musical Entity Recognition is rare, especially on Chinese song name and album name.

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下面是文件处理的另一个示例：用已知的命名结构浏览MP 3文件的目录并抽取专辑名。

Here's another example of file processing: look through a directory of MP3 files with a known naming structure and extract the album name.

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