n.莓系属的牧草； 英英释义： bluegrass[ 'blu:ɡrɑ:s, -ɡræs ]n.any of various grasses of the genus Poa同义词：blue grassan area in central Kentucky noted for it bluegrass and thoroughbred horses同义词：Bluegrass CountryBluegrass Regiona type of country music played at a rapid t