求翻译：1.知道鸭源鸡杆菌有疫苗了2.根据临床症状和特点，此种病没有禽流感、新城疫严重，因为禽流感、新城疫变异速度快，很难预防和治疗3.跟普通疫苗差不多，没有什么太大的特点是什么意思？

1. Duck source chicken bacilli vaccine based on clinical symptoms and characteristics such disease avian influenza, Newcastle disease seriously because of avian influenza, Newcastle disease variation fast, it is difficult to prevent and treat 3 about the same as with the ordinary vaccine not much fe

1.know that ducks and chickens from the Haemophilus influenzae type b vaccines have been based on clinical symptoms, and characteristics, this type of disease is not avian flu outbreak, Metro, because bird flu outbreak, Metro speed variation, it would be difficult to prevent and treat common vaccine

1. knew the duck source chicken bacillus had the vaccine 2. basis clinical symptoms and the characteristic, this kind of sickness did not have the bird flu, the new town epidemic disease to be serious, because the bird flu, the new town epidemic disease variation speed was quick, very difficult to p

1. know the duck-derived Bacillus vaccine in chickens 2. based on clinical symptoms and characteristics of such diseases are not avian influenza, Newcastle disease virus serious, because avian influenza, Newcastle disease virus mutation rate fast, it is difficult to prevent and treat 3. almost like

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