the GMT of immunity antibody and the average protective rates of experimental chicken reached 25,22.25 and 66.7%,0% at 51,58 days old.是什么意思_the GMT of immunity antibody and the average protective rates of experimental chicken reached 25,22.25 and 66.7%,0% at 51,58 days old.在线翻译_英语_读音_用法_例句