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1. The red color of theblood is due to the presence ofcrocein.
血液的红色是由于存在血红素。
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2. Crocein is apigment found in many plants and animals.
血红素是一种存在于许多植物和动物中的色素。
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3. The discovery of crocein has led to new treatments for certaindiseases.
发现血红素导致了对某些疾病的新治疗方法的出现。