a group of sheep

例句：

1. 1. The farmer has agroup of sheep in his farmyard.
   农场主的院子里有一群羊。
2. 2. She ledthe group of sheep to safety.
   她带领着一群羊安全地离开了。
3. 3. The shepherd watched over the group ofsheep during the night.
   牧羊人夜间守护着一群羊。