blood mast cell

例句：

1. 1. He was diagnosed with leukemia, which affects blood cells.
   他被诊断出患有白血病，这是一种影响血细胞的疾病。
2. 2. Blood cells play a crucial role in the immune system.
   血细胞在免疫系统中起着至关重要的作用。
3. 3. The patient's blood cells were analyzed to determine the cause of his illness.
   患者的血细胞被分析以确定他疾病的起因。