bluegrass/ˈbluː.ɡræs/名词蓝草音乐(美国南部的一种乡村音乐,用吉他、班卓琴、小提琴等弦乐器演奏)We went to a music festival over the weekend and enjoyed listening to some fantastic bluegrass bands performing live.这个周末我们去了一个音乐节,享受了一些出色的蓝草乐队现场表演。想跟读,去练习