1. the blood group whose red cells carry the A antigen. 
   红细胞携带a抗原的血型。
2. the blood group whose red cells carry the B antigen. 
   红细胞携带b抗原的血型。
3. a blood group antigen possessed by Rh-positive people; if an Rh-negative person receives a blood transfusion from an Rh-positive person it can result in hemolysis and anemia. 
   洛氏阳性人群所拥有的血液抗原；如果洛氏阴性人群接受洛氏阳性人群的输血就会导致溶血和贫血。
4. His valet, James E. Amos, wrote a book about him entitled Theodore Roosevelt, Hero to His Valet. In that book Amos relates this illuminating incident: 
   他的黑人侍从爱默士，曾写了一本关于他的书，书名是「西道尔.罗斯福恃从心目中的英雄」，在那本书?，爱默士说出一椿感人的故事:
5. What is your blood group? 
   你属什么血型的？

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