In the past, highly pathogenic viruses have been isolated from migratory birds on very rare occasions involving a few birds, usually found dead within the flight range of a poultry outbreak.
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过去在禽流感爆发的区域内在死亡的候鸟,少数情况在家禽体内分离到了高致病性病毒。
单词 In the past, highly pathogenic viruses have been isolated from migratory birds on very rare occasions involving a few birds, usually found dead within the flight range of a poultry outbreak. 的词典定义。@海词词典-最好的学习型词典
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