She is singing a folk song.

她在唱一首民歌。

youdao

She sang us a folk song.

她给我们唱了首民歌。

youdao

She hummed a folk song.

她哼着一首民歌。

youdao

Chesley Sullenberger "The Ballad of Casey Jones" is a folk song about a train engineer who saved the lives of his passengers in a wreck.

VOA: special.2009.01.30

That could include people like the Lomaxes who copyrighted a new arrangement of an old folk song.

VOA: special.2010.01.25

is an example of a traditional folk song.

VOA: special.2009.07.27

The text and melody of the final movement are drawn from a Silesian folk song, again from the perspective of a grieving mother.

WSJ: Henryk G��recki | Symphony of Sorrowful Songs | A Lament for Lost Children | Masterpiece by Ian Marcus Corbin

To me, watching Wynton Marsalis construct a new piece from the chord progressions of a South African folk song is a little like magic.

FORBES: The Shape of Things to Come

The petite woman sat in a circle with other women who clapped and sang a Nepali folk song.

FORBES: Live-in Nanny Couldn't Find Household To Call Home