cell free zone

例句：

1. 1. The hospital is in a cell free zone to prevent infections.
   医院位于一个无细胞区以防止感染。
2. 2.The research team conducted their experiments in a cell free zone.
   研究小组在无细胞区进行了他们的实验。
3. 3. The new drug was tested in a cell free zone to ensure its safety.
   新药在无细胞区进行测试以确保其安全性。