在谷仓里，我发现了一面鼓。它之前是旧收音机上的部件，像一把吉他，但只有四根弦。
In the barn, I found a drum, which used to be part of an old tape-recorder. It's like a guitar, but it has four strings.
小提琴有四根弦吗？
小提琴有四根弦。
这是一部用两根弦的中国二胡演奏四根弦的小提琴名曲的杰作。
An original violin composition. The difficult technique of this piece lies in performing this classical music with a 2-string "Erhu" .
这个调弦是标准调弦的四根低弦。
This tuning is like that of the lowest four strings in standard tuning.
这个调弦是标准调弦的四根低弦。
This tuning is like that of the lowest four strings in standard tuning.
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