URL : https://github.com/cocos-creator/creator-api-docs/blob/master/zh/classes/audioEngine.md uncache 方法的示例传参目前为filepath，实际上应该为audioclip
URL : https://github.com/cocos-creator/creator-api-docs/blob/master/zh/classes/audioEngine.md
uncache 方法的示例传参目前为filepath，实际上应该为audioclip