/课程/素材/视频素材/
动态视频（50个）
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51_175_c.mov/课程/素材/
1200种音效素材
音效
摇滚音效
旋律音效
特效音
乐器声效
交替结合
动感音效
动感特效
超酷音效
超酷循环音效
常用音效
报警音效