Bird f____is a kind of terrible illness.把空格处补充完整!

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Bird f____is a kind of terrible illness.把空格处补充完整!
Bird f____is a kind of terrible illness.把空格处补充完整!

Bird f____is a kind of terrible illness.把空格处补充完整!
flu (禽流感)

禽流感(Bird Flu或Avian Influenza)
Bird flu is a kind of terrible illness.