The main reason for giving a patient blood is that it carries oxygen.
给病人输血的主要原因是血液含氧。
Iron also carries oxygen in muscles, helping them function properly.
铁同样可以将氧气带至肌肉帮助其正常工作。
The amount of hemoglobin (the protein that carries oxygen) in the red blood cells.
红细胞内血红蛋白（携氧的蛋白）的量。
Red blood cell: a specialized cell, full of haemoglobin, which carries oxygen in the blood.
红细胞—血液中含有血红蛋白的特殊细胞，携带氧气。
It carries oxygen from your lungs to he rest of your body.
它将氧气带至肺及身体的其他部位。
Iron is important because it carries oxygen in the blood.
由于在血液中的运氧功能，铁元素颇为重要。
Iron is important because it carries oxygen in the blood.
由于在血液中的运氧功能，铁元素颇为重要。
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