Can't use convenient revenue collection/sharing mechanisms available for paid apps and for in-app advertising and up selling features found in native APIs
对于付费应用和嵌入应用的广告没有便利的收益统计/分享机制，也不能通过销售原生API的特性来获取收益
The Million Song Dataset is a freely-available collection of audio features and metadata for a million contemporary popular music tracks.
又一个音乐数据库，帮助爱音乐的你了解更多，甚至可以做音乐研究。这是数据库的介绍，以及如何使用数据资源。
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