周末我们去了一个小镇听蓝草音乐，小提琴和曼陀林的声音美妙极了。

We went to a small town on the weekend to listen to ___bluegrass music, and the sound of fiddles and mandolins was amazing.

这片牧场上种植的蓝草非常适合放牧牛羊。

The ___bluegrass in this pasture is perfect for grazing cattle.