Red blood cells contains large amounts of haemoglobin – the protein that gives blood both its colour and its oxygen-binding capacity.
红血球含有大量的血红素，这种蛋白质能和氧气结合并是血液呈现出红色。
Red blood cells contains large amounts of haemoglobin – the protein that gives blood both its colour and its oxygen-binding capacity.
红血球含有大量的血红素，这种蛋白质能和氧气结合并是血液呈现出红色。
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