hemin

例句：

1. 1.Hemin is a key component of red blood cells.
   血红素是红细胞的关键成分。
2. 2.The body needs hemin to carry oxygen throughout the body.
   身体需要血红素来在整个身体中输送氧气。
3. 3. Hemin deficiency can lead to anemia.
   血红素缺乏可能导致贫血。