source of the virus造句

例句与造句

1. Infected nervous tissue or salivary gland tissue is the best source of the virus .
   感染的神经组织或涎腺组织是病毒的最好来源。
2. Working with world health organization and centre for disease control and prevention to trace the source of the virus and ascertain the mode of transmission
   与世界?生组织及疾病控制及预防中心合作，追查病毒来源及确定传播途径；
3. It's difficult to find source of the virus in a sentence. 用source of the virus造句挺难的