名词
中文翻译：血液
同义词：
['blood', 'blood vessels', 'circulatory system']
例句：
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1. Hemoglobin is the protein that carries oxygen in our bodies.
血红蛋白是我们体内携带氧气的蛋白质。
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2. The hemoglobin levels in the blood are important for determining health.
血液中的血红蛋白水平对于确定健康状况很重要。
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3. Blood transfusions are used to replace lost blood during surgery or injury.
输血用于在手术或受伤时替代失去的血。