Investigated average positive rate of measles antibody is 92.9%,this rate is 88.7% in youngest age group and 94.4% in oldest age group.是什么意思_Investigated average positive rate of measles antibody is 92.9%,this rate is 88.7% in youngest age group and 94.4% in oldest age group.在线翻译_英语_读音_用法_例句