red blood cell

例句：

1. 1. Red blood cellsare responsible for carrying oxygen throughout the body.
   红细胞负责将氧气输送到身体的各个部位。
2. 2. The doctor said that she needed totake a transfusion of red blood cells.
   医生说她需要接受输血，以补充她的红细胞。
3. 3. Redblood cells are essential for maintaininggood health and preventing anemia.
   红细胞对于保持健康和预防贫血至关重要。