白血病

例句：

1. 1. He was diagnosed with leukemia and has been undergoing treatment.
   他被诊断出患有白血病，并正在接受治疗。
2. 2. Leukemia is a type of cancer that affects the blood-forming cells in the bone marrow.
   白血病是一种影响骨髓中造血细胞的癌症类型。
3. 3. The disease can be caused by exposure to radiation or chemicals, among other factors.
   这种疾病可能由暴露于辐射或化学物质等因素引起。