CD34 + cells were isolated from fresh umbilical cord blood samples with immunomagnetic beads and seeded into the models to culture ex vivo without exogenous cytokines.
免疫磁珠分选脐血cd 34 +细胞，接种于各培养体系，无外源性细胞因子条件下进行培养。
He was much excited, without either his gun or his hat, and his right hand and sleeve were observed to be stained with fresh blood.
他当时十分激动，既没带枪也没戴帽子，他们看到他的右手和袖子上都沾有新鲜的血迹。
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