violin是可数名词吗

The piece is scored for violin, viola and cello.

这个乐谱是为小提琴、中提琴和大提琴演奏而编的。

It takes a lot of practice to play the violin well.

拉好小提琴需要多加练习。

A performer plays classical selections on the violin.

一位表演者用小提琴演奏古典音乐选段。