leptocyte

例句：

1. 1.The leukocyte count in the blood is a key indicator of infection.
   血液中的白细胞计数是感染的关键指标。
2. 2. Leukemia is a type of cancer that affects the white blood cells.
   白血病是一种影响白细胞的癌症类型。
3. 3.The immune system relies on leukocytes to fight off infections.
   免疫系统依赖于白细胞来抵抗感染。