单语范例（未经PONS编辑处理）
英语
- Young birds at around two to eight weeks of age that have highly active bursa of Fabricius are more susceptible to disease.en.wikipedia.org
- Low-attenuated vaccine strains may cause damage to the bursa of Fabricius and immunosuppression in susceptible chicks.en.wikipedia.org
- The adults of these parasites occur in the bursa of Fabricius, caecum, cloaca, liver, oviduct and sometimes even under the nictitating membrane of mammals and particularly birds.en.wikipedia.org
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