flocks

a flock of一群（鸟，羊等）

flocks and herds牛羊

a flock of sheep一群羊

1. They can devour crops and kill all our flocks and herds,if it were not for the protection we get from insect-eatting animals.
   如果不是受到食虫动物的保护，它们可能吞噬我们所有的庄稼并弄死我们放养的兽群。
2. This is useful for creating effects such as flocks of birds, arrows, crowds, trajectories, bullets, or anything that needs a specific orientation relative to its movement.
   这对创建例如鸟群聚集，箭头，人群，弹道，子弹或者其他的需要粒子发射方向指向速度方向的效果。
3. Guides and flocks of sightseers were slowly parading from memory to memory.
   向导和游览的人群慢慢地从一个纪念碑走到另一个纪念碑。
4. This is useful for creating effects such as flocks of birds, arrows, crowds, trajectories, bullets, or anything that needs a specific orientation relative to its movement.
   这对创建例如鸟群聚集，箭头，人群，弹道，子弹或者其他的需要粒子发射方向指向速度方向的效果。