And so there are only two kinds of waves that can exist on this violin string, standing or traveling.

由于这只有两种波，可以存在在这条弦上，驻波或行波。

youdao

And so there are only two kinds of waves that can exist on this violin string, standing or traveling.

由于这只有两种波，可以存在在这条弦上，驻波或行波。

youdao