disease-free animal

例句：

1. 1. The farm is committed to raising disease-free animals for the market.
   农场致力于为市场养殖无疾病动物。
2. 2.The research team focused on studying disease-free animals to understand their immune systems.
   研究团队专注于研究无疾病动物，以了解其免疫系统。
3. 3. The government has implemented strict regulations to ensure that all animals are disease-free.
   政府实施严格的规定，确保所有动物都是无疾病的。