这本是我的书，《聆听音乐》，现在已经是第五版了。
It is my own textbook, "Listening to Music", now in the fifth edition.
Fit by Fun通过一个动画版教练来指导健身，伴随欢快的音乐，网站实时显示“同学”名单，让人有集体活动的感觉。
Fit by Fun animates your exercise with illustrated trainers, upbeat music and a community feel, giving you a list of "classmates" currently using the site.
在音乐行业，非官方的混音版也能促进原版销售。
In music unofficial remixes can boost sales of the original work.
应用推荐