无致病力的

例句：

1. 1. The bacteria that cause food poisoning are known to be non-pathogenic.
   引起食物中毒的细菌被认为是无害的。
2. 2. The vaccine is designed to protect against diseases that are known to be harmless.
   这种疫苗旨在预防已知无害的疾病。
3. 3. The study found that the pesticide was non-pathogenic and did not harm the environment.
   研究发现，这种杀虫剂是无害的，不会对环境造成伤害。