The common colours are: blue for nitrogen, red for oxygen, yellow for sulphur and cyan for carbon.
颜色代表是：蓝色是氮，红色是氧，黄色是硫，蓝绿色(青色)是碳。
Hemoglobin is the protein in red blood cells that is responsible for carrying oxygen from the lung to the other tissues.
血红蛋白是血红细胞中的蛋白质，它负责将氧气从肺运送到其他组织当中。
Hemoglobin is the protein in red blood cells that is responsible for carrying oxygen from the lung to the other tissues.
血红蛋白是血红细胞中的蛋白质，它负责将氧气从肺运送到其他组织当中。
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