The sound of the mandolin is a very curious sound because it's cheerful and melancholy at the same time, and I think it comes from that shadow string, the double strings.
曼陀林的声音是一种非常奇怪的声音，因为它是欢快的同时也是忧郁的，我认为它来自于阴影弦，双弦。
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Cheerful
Sound
Time