blue·grass /-ˌgræs/
莓系屬的牧草
bluegrass
n 1: any of various grasses of the genus Poa [syn: blue grass]
2: an area in central Kentucky notied for it bluegrass and
thoroughbred horses [syn: Bluegrass Country, Bluegrass
Region]
3: a type of country music played at a rapid tempo on banjos
and guitars