VOA慢速英语:Harmonica Playing Good for Body and Soul

lung - n. either one of the two organs that people and animals use to breathe air

country music - n. a style of music that developed in the southern and western U.S.

asthma - n. a physical condition that makes it difficult for someone to breathe

stair - n. a series of steps that go from one level or floor to another

cake - n. a sweet baked food made from a mixture of flour, sugar, and other ingredients

ain't - informal. a very informal way to say 'is not' or 'are not'