1. Gnotobiotic animals are often used in research to study the effects of specific microorganisms on health.

无菌动物常常被用于研究特定微生物对健康的影响。

2. The gnotobiotic facility at the research institute maintains a controlled environment to ensure the absence of any microbial contamination.

研究所的无菌设施维持着受控的环境，以确保没有任何微生物污染。