The SP20 is a professional diatonic harmonica with excellent tone color and playing performance, which is worth owning. SP20是一支专业口琴10布鲁斯口琴，在音色和可控性上都是出色的，值得订购。
One day, a beggar comes to the door with a violin. 他一气之下决定让his daughter marry a beggar.
There are four strings on a violin. 小提琴有四根弦。
They were akin to a violin with only one string and no fingerboard, capable of playing only one note (ignore for the moment that musical notes are much richer than pure tones). 它们像是只有一根弦而且没有指板的小提琴，只能奏出单一音调（先不管音调其实比纯音要来得丰富）。