herd immunity造句

例句与造句

1. It could be used for the surveillance of herd immunity and for the examination of immunization quality . it could aslo be used for diagnosis and epidemiologic investigation of streptoccus suis
   该方法操作简便快捷， 2 . 5小时即可得出结果；结果客观，易于判定；重复性好；各种试剂材料均可做到标准化。
2. It's difficult to find herd immunity in a sentence. 用herd immunity造句挺难的