avian leukosis complex

例句：

1. 1.The avian leukosis complex is a major cause of cancer in birds.
   禽白血病复合体是鸟类癌症的主要原因。
2. 2.Researchers are studying the avian leukosis complex to find new treatments for cancer.
   研究人员正在研究禽白血病复合体，以寻找新的癌症治疗方法。
3. 3. The avian leukosis complex has been found to be associated with certain genetic mutations.
   研究发现，禽白血病复合体与某些基因突变有关。