The morbidity of immunized chickens were about 78.17%, and the percentage of one flock chickens have come on IBD again were about 16.98%.是什么意思_The morbidity of immunized chickens were about 78.17%, and the percentage of one flock chickens have come on IBD again were about 16.98%.在线翻译_英语_读音_用法_例句