通过禽胚减毒的,禽化的
At least one avian disease pathogen has been found. 已经发现至少有一种禽病的病原体。
Can influenza vaccine prevent avian flu? 流感疫苗可预防禽流感吗?
How is avian influenza transmitted? 禽流感是怎样传染的?
For example: he is an expert in avian studies. 他是鸟类研究的专家。
Selenium Deficiency the Inner Cause of Avian Flu? 是什么导致禽流感?
