for a song

基本解释

They bought that house for a song.
他们廉价地买下那幢房子。
《新英汉大辞典》
He knocked the artist down for a song.
他指名要求该艺术家唱一首歌。
But if anyone sees an opportunity to buy the entire firm for a song, they have yet to reveal themselves. Perhaps with good reason.
但如果有人认为这是廉价购买整个公司的好机会的话，（雷曼公司内部人）可能早就以正当的理由这样做了。

The song is about leaving the big city for the countryside, going home again after a long time away.
It would appear that Milton's suggesting that it's chastity that actually establishes something like a precondition for hearing and learning that inspired song that's actually sung before the throne of God in Revelation.
那表明了弥尔顿的建议,关于确实是贞操建立了某些事物,像听和学的事先准备对歌的启发作用,在《启示录》里确实在上帝面前唱了。
耶鲁公开课 - 弥尔顿课程节选
A listener hears the mournful feeling cowboys had for the prairie in this song called, "The Dying Cowboy."

And it struck me — boy, what a great title for a song, you know?
NPR: Bob Seger Changes His Tune About Detroit