culling

挑选

Every year the groups of seals that live off our coasts are culled out because they eat too much fish.

每年居住在我们海岸边的海豹都被人挑选一部分杀死，因为它们吃掉的鱼太多。

Deer are culled by hunters.

猎人把鹿杀掉了一批。