facteur rhésus positif
/ˈblʌd ˈfaktə ˈpɒzɪtˌɪv/
n
English: blood factor positive · Rh阳性
Sens：Individuals are Rh positive when their red blood cells carry an Rh molecule (antigen); the Rh factor is positive in about 85% of the population. composition of the blood