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작성일 : 21-07-18 22:38
CNN: Life's miracle substance
 글쓴이 : 관리자
조회 : 15  
   https://edition.cnn.com/videos/health/2015/11/25/orig-your-body-the-ul… [0]
Dr. Sanjay Gupta explains why your body's blood is such a remarkable substance.