purified virus

例句：

1. 1. The researchers purified the virus and studied its properties.
   研究人员对病毒进行了净化，并研究了其性质。
2. 2.During the outbreak, hospitals used purification methods to treat patients with the virus.
   在疫情爆发期间，医院使用净化方法治疗患者。
3. 3. The virus was purified using a special method that removed all impurities.
   该病毒被特殊方法净化，去除了所有杂质。