kǒu / qín / lǐ / de / huáng / piàn / zhèn / dòng / shí / huì / fā / chū / qīng / liàng / de / shēng / yīn口琴里的簧片振动时,会发出清亮的声音。When the reeds in a harmonica vibrate, they produce a clear sound.