Listen to 效率提升学习之音 online. 效率提升学习之音 is an Instrumental language song and is sung by 颜云飞. 效率提升学习之音, from the album 写作业纯音乐-刷题背书轻音乐-治愈纯音乐, was released in the year 2022. The duration of the song is 2:08. Download Instrumental songs online from JioSaavn.