求翻译：因为很多病毒性疾病会表现出相同的临床症状，比如发烧、鸡冠下垂、平伏、棕绿色痢疾等，同时在实验解剖阶段，鸡群的各阶段病例性特征也有很多相似性，比如减蛋综合症中鸡群解剖后会看到输卵管萎缩、出血等，有很多细菌性疾病、病毒性疾病表现出的临床症状存在很多相似性，所有不好做确诊。是什么意思？

Because many viral diseases will exhibit the same clinical symptoms such as fever, drooping crest, equatorial, brownish-green dysentery, while in the stage of experimental anatomy, chickens each stage of the case characteristics there are a lot of similarities, such as egg drop syndrome will see flo

Since there are many viral diseases will be shown the same clinical symptoms such as fever, chicken, sag Win-V, brown, green, and at the same time diarrhea in the Lab phase, the chicken farm anatomy of the various stages of cases there are also many characteristics of similar, such as the chicken eg

Because very many sickness toxic disease can display the same clinical symptom, for instance has a fever, the cockscomb sagging, lies flat, brown green dysentery and so on, simultaneously dissects the stage at the experiment, the chicken group various stages case of illness characteristic also has v

Because many virus sexual disease will performance out same of clinical symptoms, such as fever, and celosia cristata sagging, and flat Volt, and brown green dysentery,, while in experimental Anatomy stage, chicken group of the stage case sexual features also has many similar sexual, such as reducti

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