leucoma

例句：

1. 1. He was diagnosed witha rare form of leukemia.
   他被诊断出患有一种罕见的白血病。
2. 2. The treatmentfor leukemia involves chemotherapy and radiationtherapy.
   白血病的治疗包括化疗和放疗。
3. 3. Leukemia is a type of cancer that affectsthe blood-forming cells in thebone marrow.
   白血病是一种影响骨髓中造血细胞的癌症类型。