The number of jazz fans has risen slightly since the 70s while classical music has fallen further.
问题描述：
The number of jazz fans has risen slightly since the 70s while classical music has fallen further.
remaining the least popular style of music today.另外,这里的remain为什么要加ing呢?
答
70年代以来,爵士音乐的粉丝数略有上升,同时古典音乐的粉丝却下降了.
remaining the least popular style of music today.
remaining表示一种状态,可以理解为固定的用法吧,后面加名词或者形容词.
意思为：仍然是现在最不流行的音乐形式.