Jack: My daughter's music lessons are a fortune to me.

John: How is that?

Jack: They enabled me to buy the neighbor's houses at half price.

杰克：我女儿的音乐课对我来说就是一笔财富呀。

约翰：这是怎么回事呢？

杰克：因为音乐课使我们只用半价就买下了邻居的房子。