1. The veterinarian prescribed a flukicide to treat the livestock's parasite infection.
兽医开了一种杀虫剂来治疗牲畜的寄生虫感染。
2. The use of flukicides has greatly reduced the prevalence of liver flukes in the area.
使用杀虫剂大大减少了该地区肝吸虫的流行程度。