适合学习，备考，论文的一些音乐。让我们闭上眼睛，放松一下大脑，或者边听边学。

2 HOUR LONG Piano Music for Studying, Concentrating

BEST Music to Help Study and Work

Music for studying : 2 hours non stop to concentrate, work

Study Music: Studying Music and Concentration Music

2 Hours long play〜sleeping music.relaxing music.calming