livestock pest

例句：

1. 1. The farmers are worried about the damage caused by the livestock pest.
   农民们担心牲畜害虫造成的损害。
2. 2.The government has launched a campaign to control the livestock pest population.
   政府已经发起了一场运动来控制牲畜害虫的数量。
3. 3.The farmer used a natural repellent to keep the livestock pest away from his farm.
   这位农民使用了一种天然的驱虫剂，将他农场的牲畜害虫拒之门外。